Kos Parasite Bloodborne Wiki » Weapons » Kos Parasite

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Table of Contents

Basic Information

In-Game Description

Overview

Availability

Gem Shapes and Alternate Weapons

Gem Advice

Key Attacks

Durability

Notes

Merchants

Upgrade Table

Average Physical Attack Increase (Arcane)

Normal Mode Attacks Properties (Milkweed Rune)

Transformed Mode Attacks Properties (Milkweed Rune)

Normal Mode Attacks Properties (Fists / Kos Parasite)

Transformed Mode Attacks Properties (Fists / Kos Parasite)

Key

Basic Information

Image	Name	Damage	QS Bullet Use	Durability	Stats Req. / Bonus	Special Attack	Rally	Buffable
	Kos Parasite	- / - / 30 / - / - (Arcane)	2	600	- / - / - / 20 - / - / - / A	- / - / 100 / 100	30 (no upgrade)	No

Kos Parasite ❘ ゴースの寄生虫	Right Hand Weapon

In-Game Description When the carcass of Kos washed up on the coast, its insides were teeming with tiny parasites, unlike any found in humans. This atypical weapon can only be clasped tight and swung, but a Kos Parasite is said to stimulate phantasms inhabiting a lumenwood. Note 1: The same in-game description in US & UK versions. ✓ Note 2: Original Japanese text on Original Japanese Item Index page. ✓ Overview The Kos parasite has no requirements other than 20 arcane. It's a big investment, but this is a weapon intended for characters heavily focused on this stat and aiming to take advantage of its impressive scaling. When equipped, nothing will appear to change. This would lead many to assume that the weapon is useless; but this is far from the truth. The true power of the Kos Parasite is revealed when used in combination with the Milkweed Rune. The Kos Parasite is an arcane weapon in the purest of senses. All of its attacks deal solely in this damage type. On top of its already excellent scaling, its damage multipliers are usually close to, or even double the weapon's attack rating! Even so, you may have trouble dealing sufficient damage to enemies with high arcane defenses, or players using the Loch Shield, so this weapon is not ideal for all situations. Normal Mode: Attacks are slow in normal mode, and chain into each other at an equally sluggish pace. It's useful against enemies with low to no super armor, but can otherwise leave you open during attacks. Take note that its stamina use is much more reasonable in comparison to the transform mode. This only highlighted by the similar damage output between them. Transformed Mode: The Kos Parasite's attacks are much better in transform mode. While still quite slow, they receive a good increase in reach. One of the main downsides to using this mode is in its stamina to use. It lacks a charged R2, so you'll need to use the normal mode for to use rear visceral attacks. It also requires the use of both hands, so frontal visceral attacks are out the question as well. Availability Normal: Dropped by (The Old Hunters DLC): Orphan of Kos in Fishing Hamlet Uncanny: Sold by: Chalice Bath Messengers & Patches, the Spider; Pthumeru L1, main area, 8i29rqz3 - [video] Lost: Sold by: Chalice Bath Messengers & Patches, the Spider; Pthumeru L1, main area, 8i29rqz3 - [video] Gem Shapes and Alternate Weapons Right-hand weapons can have up to three gem slots, and some left-hand weapons have one slot. There are different slot shapes, though; not every gem will fit every slot. The slot types are: Radial, Triangular, Waning, and Circle. Your gem's shape needs to match the slot you want to use it in. If you find a really great gem but the shape doesn't properly match your weapon, don't give up hope. There are actually two alternate versions of every right-hand weapon - the Lost and Uncanny versions. They're identical to normal weapons except that they have different slot configurations (► Blood Gems Sockets on the right). These alternate weapons can be found in Chalice Dungeons. There is also an exceedingly rare fifth type of gem shape - Droplet gems. These are "almighty" gems; they can fit in any type of gem slot! Gem Advice The Kos Parasite is already an elemental weapon, so it can't be buffed with items or converted to another damage type with gems. Don't bother with Tempering gems as these will have little effect. Instead, think about increasing your arcane damage with Arcane and Odd Arcane gems. The Kos Parasite uses a lot of stamina while transformed; especially if you are using evasive attacks, such as quickstep R1s. If you often find yourself using the projectile vomit attack, you may want to consider slotting Murky gems to increase your poison buildup. Since this will add buildup to all of your attacks, you can poison. For more information check the Best Blood Gem Setups page. Key Attacks Normal Mode: The Kos Parasite's R1 fill chain is slow with low reach. The first two hits swing horizontally, but aren't particularly wide or good against crowds. Really, you'll want to use the rolling and quickstep R1s for damage. These will send a wriggling tentacle a solid span forward, which hits multiple times. These attacks are useful for evasive play, which may be necessary against enemies with high super armor. The backstep R1 will cause your character to projectile vomit forward. It will do relatively low damage on impact, but its main purpose is to poison enemies. This can be a bit impractical to use as it will usually land at the origin point of your backstep. However, by unlocking and angling the camera upwards, you can increase the distance your vomit travels! A fully charged R2 takes a while to perform, but can stagger opponents from behind. It has pretty good range, so you can use it for sneaking up on enemies. On the other hand, its second hit can miss if you're not close enough, so you don't want to stand too far from your target. Transformed Mode: The R1 chain is much more useful this time around. The ranges of these attacks are increased in this mode, and the third hit finishes off with heavy impact. Rolling and quickstep R1s also see improvements in reach, but use more stamina and do less damage. You can still use the backstep R1 to vomit on enemies, but it costs a lot more stamina, so you're better off using this attack in normal mode. The R2 is one of the best attacks you can use in this mode. On top of having great range, it strikes with high damage and massive impact. Although this consumes a lot of stamina, you can use its length to even further distance yourself for hit-and-run tactics. An even better attack you can use is the dashing R2; it has similar reach, does better damage, but requires more stamina. Since you need some space to get the dash going, it works best as an opening attack. A single use of the L2 will do slightly more damage than a full R1 chain. This attack is a large, multi hit area of effect explosion that consumes two bullets when used. The startup is slow, so you'll need to careful about when you use it, especially against foes with high super armor since they may continue attacks through the initial hits. Another thing to keep in mind is your bullet count. Without enough bullets, this attack will attempt and fail which can leave you wide open for a period of time. Durability Durability of the weapon depletes when used. This means hitting an enemy, destructible object or bouncing off the walls. Hitting undestructible objects and environment does not deplete your durability. Style of an attack or upgrade of the weapon, even different weapon, does not matter - each count as one hit. Every 10th hit against the enemy/object depletes 1 durability. Exception is Tonitrus, which when in self buffed mode, depletes durability at rate of 2 hits. Hitting an enemy in dying animation still counts as hit. Also hitting multiple enemies/destructible objects at once counts as one hit per enemy - hitting 3 enemies at once counts as 3 hits towards durability counter. Shields lose 1 durability every 10th hit. Bounce means when your hit is bounced back off the wall or other objects. Every 5th bounce depletes 1 durability. Not every weapon can be bounced off, Kos Parasite belongs into the category which cannot. Damage reduction when heavily worn. When weapon is at 30% of total durability, it reaches the Risk state and AR is reduced by 30% and when it hits 0% of total durability, weapon is Broken, then AR is reduced by 50%. Kos Parasite which has 600 points of durability reaches risk state at 180 Dur. Workshop's Repair: cost of repair depends on the weapon and its upgrade. For Kos Parasite +0 it's 1 Blood Echoes per 1 point and for Kos Parasite +10 it's 2 (values are rounded), full repair costs for +10 are 1400 Blood Echoes. Notes This Weapon is part of The Old Hunters DLC. Weapon's Rally: A lot of attacks multiply the rally number by their attack damage multiplier. Some of them are special-cased to have a different amount of rally, both multipliers can be seen in the Normal & Transformed Mode Attacks Properties tables below. Rally number (in flat HP) can be raised by upgrading the weapon, as seen in the Upgrade Table below. Uncanny and Lost versions are sold in every Chalice Bath Messengers & Patches, the Spider shop, both for the same price. Uncanny and Lost versions available for purchase after obtaining normal version of the weapon. Video: Bloodborne - New DLC Weapon "Kos Parasite" Location by tassssssssss. To use this weapon you must have the Milkweed Rune on (it is obtained by Saint Adeline, the woman in the chair asking for Brain Fluid in the Research Hall - the room to the right of the lamp). You give her 3 Brain Fluid and she will give you the rune. Uncanny and Lost versions replaces Kos' name with variants: Uncanny & Lost Parasite. Moveset Data: If parasite is used without Milkweed Rune, it deals arcane damage if hit with Kos Parasite instead of fists. You can find concept art of the Kos Parasite in Bloodborne Official Artworks, on page 247.

Blood Gems Sockets Kos Parasite Uncanny Parasite Lost Parasite

Merchants

Shop	Buy (Day)	(Evening)	(Night)	(Red Moon)	(NG+)	Sell	Requirement
Bath Messengers [Hunter's Dream]	-	-	60000	60000	60000	18000	Kos Parasite
Insight Bath Messengers [Hunter's Dream]	-	-	-	-	-	-	None
Chalice Bath Messengers [Chalice Dungeons Common]	-	-	60000	60000	60000	-	Kos Parasite
Patches, the Spider [Chalice Dungeons Rare]	-	-	60000	60000	60000	-	Kos Parasite

Uncanny & Lost Parasite: Acquiring any weapon that's new in The Old Hunters DLC will also unlock its Uncanny and Lost variant in Chalice Bath Messengers & Patches, the Spider shop, for the same price as normal variant. Purchasing these variants will then make them available back in the regular Bath Messengers shop.

Upgrade Table

Name	Blood Gem Sockets	Rally
Kos Parasite +0	0 / 3	30	-	-	30	-	-	-	-	-	A	-	-	-	-	-
Kos Parasite +1	1 / 3	33	-	-	33	-	-	-	-	-	A	3	-	-	-	180
Kos Parasite +2	1 / 3	36	-	-	36	-	-	-	-	-	S	5	-	-	-	220
Kos Parasite +3	2 / 3	39	-	-	39	-	-	-	-	-	S	8	-	-	-	260
Kos Parasite +4	2 / 3	42	-	-	42	-	-	-	-	-	S	-	3	-	-	300
Kos Parasite +5	2 / 3	45	-	-	45	-	-	-	-	-	S	-	5	-	-	360
Kos Parasite +6	3 / 3	48	-	-	48	-	-	-	-	-	S	-	8	-	-	400
Kos Parasite +7	3 / 3	51	-	-	51	-	-	-	-	-	S	-	-	3	-	440
Kos Parasite +8	3 / 3	54	-	-	54	-	-	-	-	-	S	-	-	5	-	480
Kos Parasite +9	3 / 3	57	-	-	57	-	-	-	-	-	S	-	-	8	-	520
Kos Parasite +10	3 / 3	60	-	-	60	-	-	-	-	-	S	-	-	-	1	560
		(in flat HP)	Damage					Stat Bonuses				Cost

To fully upgrade Kos Parasite requires 16 Blood Stone Shards, 16 Twin Blood Stone Shards, 16 Blood Stone Chunks, 1 Blood Rock and 3720 Blood Echoes.

Name
Kos Parasite +0	0.00	0.00	0.00	1.00
Kos Parasite +1	0.00	0.00	0.00	1.06
Kos Parasite +2	0.00	0.00	0.00	1.12
Kos Parasite +3	0.00	0.00	0.00	1.18
Kos Parasite +4	0.00	0.00	0.00	1.24
Kos Parasite +5	0.00	0.00	0.00	1.30
Kos Parasite +6	0.00	0.00	0.00	1.36
Kos Parasite +7	0.00	0.00	0.00	1.42
Kos Parasite +8	0.00	0.00	0.00	1.48
Kos Parasite +9	0.00	0.00	0.00	1.54
Kos Parasite +10	0.00	0.00	0.00	1.60
	Scaling

Scaling determines how much additional damage a weapon deals. You gain a percentage of the weapon's base damage as additional damage, indicated by a "+" next to the weapon's base damage.

Average Physical Attack Increase (Arcane)

Stat Range (Arcane)	Damage per Point	Estimated Attack Gained	Stat Range (-)	Damage per Point	Estimated Attack Gained
20 to 25	5.40	27
26 to 50	1.32	33
50 to 99	0.31	15
Note: This table represents growth with a +10 weapon

Normal Mode Attacks Properties (Milkweed Rune)

Attack	DMG X	Type	Stamina	Rally X	Impact	Note
R1	2.00	Arcane	24	1.00	Normal
→ R1 (2nd)	2.10		24	1.10	Heavy
→ → R1 (3rd)	2.20		24	1.20	Heavy
R1 (backstep)	1.50		18 (+10)	0	Normal	projectile vomits forward; inflicts 70 Slow Poison buildup
R1 (rolling)	1.00 + 1.70		18 (+10)	0.3 + 1.7	Normal
R1 (frontstep)	1.00 + 1.70		18 (+10)	0.3 + 1.7	Normal
R1 (sidestep)	1.00 + 1.70		18 (+10)	0.3 + 1.7	Normal
R1 (dash)	2.10		28 (+X)	1.10	Normal
R2	2.35		40	1.50	Heavy
R2 (charged)	1.00 + 2.70		50	0.3 + 1.7	Heavy	continuously hold the button to execute
R2 (backstep)	2.20		32 (+10)	1.20	Heavy
R2 (dash)	1.00 + 2.35		44 (+X)	0.3 + 1.0	Heavy
R2 (forward leap)	2.45		50	2.50	Normal	tap forward on the stick just as you press R2 to execute
Transform Attack	2.20		28 (+X)	2.00	Heavy	press L1 while performing another action to execute; forced Guard Break
Plunge Attack	2.45		50	2.50	Massive	press R1 or R2 while falling to execute
Plunge Attack (2nd hit)	1.60	Blunt / Arcane	-	0.00	Normal	Plunge (AoE)

Note: Damage Multiplier data from official guide checked with http://darksouls2verificationdata.web.fc2.com/motion-bloodborne.html for correction after patch 1.09. There's physical damage types defined for every attack which can only occur when you add flat physical gems, but that's so obscure and completely irrelevant.

Feb 2022 Update: All attack properties (damage multiplier, damage type, stamina cost & attack impact) verified with datamined game files and added rally values for each attack.

Transformed Mode Attacks Properties (Milkweed Rune)

Attack	DMG X	Type	Stamina	Rally X	Impact	Note
R1	2.10	Arcane	28	1.00	Normal
→ R1 (2nd)	2.10		28	1.10	Heavy
→ → R1 (3rd)	2.35		28	1.50	Heavy
R1 (backstep)	1.50		18 (+10)	0	Normal	projectile vomits forward; inflicts 70 Slow Poison buildup
R1 (rolling)	2.05		22 (+10)	1.00	Heavy	quick surprise attack
R1 (frontstep)	2.05		22 (+10)	1.00	Heavy
R1 (sidestep)	2.05		22 (+10)	1.00	Heavy
R1 (dash)	2.20		32 (+X)	1.20	Normal
R2	2.50		56	1.50	Heavy
R2 (backstep)	2.40		44 (+10)	1.40	Heavy
R2 (dash)	1.10 + 2.50		60 (+X)	0.3 + 1.2	Heavy	good range and damage
R2 (forward leap)	2.50		56	2.50	Heavy	tap forward on the stick just as you press R2 to execute
L2	0.90		100	0	None	large area of affect attack; uses 2 bullets
L2 (2nd hit)	1.10		0	0	None	second hit
L2 (3rd hit)	1.10		0	0	Light	third hit
L2 (4th hit)	3.20		0	0	Heavy	fourth hit
Transform Attack	2.00		24	0	Normal	press L1 while performing another action to execute; forced Guard Break; shoots 15 projectiles
Plunge Attack	1.45		56	2.50	Massive	press R1 or R2 while falling to execute
Plunge Attack (2nd hit)	1.60	Blunt / Arcane	-	0.00	Normal	Plunge (AoE)

Note: Damage Multiplier data from official guide checked with http://darksouls2verificationdata.web.fc2.com/motion-bloodborne.html for correction after patch 1.09.

Feb 2022 Update: All attack properties (damage multiplier, damage type, stamina cost & attack impact) verified with datamined game files and added rally values for each attack.

Normal Mode Attacks Properties (Fists / Kos Parasite)

Attack	DMG X	Type	Stamina	Rally X	Impact	Note
R1	1.00	Physical (Fists) Arcane (Kos)	15	1.00	Light
→ R1 (2nd)	1.02		17	1.00	Light
→ → R1 (3rd)	1.05		20	1.00	Light
→ → → R1 (4th)	1.07		22	1.00	Light
→ → → → R1 (5th)	1.10		25	1.00	Light
R1 (backstep)	0.95		20 (+10)	1.00	Light
R1 (rolling)	0.95		15 (+10)	1.25	Light
R1 (frontstep)	0.95		15 (+10)	1.00	Light
R1 (sidestep)	0.95		15 (+10)	1.00	Light
R1 (dash)	1.10		20 (+X)	1.25	Light
R2	1.25		30	1.30	Light
R2 (charged)	1.45		45	1.30	Normal
R2 (backstep)	1.20		30 (+10)	1.25	Normal
R2 (dash)	1.30		35 (+X)	1.25	Normal
R2 (forward leap)	1.40		40	1.45	Normal
Transform Attack	1.20		20 (+X)	1.50	Normal
Plunge Attack	1.45		50	1.45	Massive	press R1 or R2 while falling to execute
Plunge Attack (2nd hit)	1.45		-	0.00	Normal	Plunge (AoE)

Note: Damage Multiplier data from official guide checked with http://darksouls2verificationdata.web.fc2.com/motion-bloodborne.html for correction after patch 1.09.

Feb 2022 Update: All attack properties (damage multiplier, damage type, stamina cost & attack impact) verified with datamined game files and added rally values for each attack.

Transformed Mode Attacks Properties (Fists / Kos Parasite)

Attack	DMG X	Type	Stamina	Rally X	Impact	Note
R1	1.20	Physical (Fists) Arcane (Kos)	20	1.2	Light
→ R1 (2nd)	1.22		22	1.20	Light
→ → R1 (3rd)	1.25		25	1.20	Light
→ → → R1 (4th)	1.27		27	1.20	Light
R1 (backstep)	1.15		20 (+10)	1.20	Light
R1 (rolling)	1.15		20 (+10)	1.10	Light
R1 (frontstep)	1.15		20 (+10)	1.00	Light
R1 (sidestep)	1.15		20 (+10)	1.00	Light
R1 (dash)	1.25		25 (+X)	1.15	Light
R2	1.42		40	2.00	Normal
R2 (charged)	2.00		55	2.50	Heavy
R2 (backstep)	1.35		40 (+10)	1.25	Normal
R2 (dash)	1.45		40 (+X)	1.35	Normal
R2 (forward leap)	1.50		40	1.45	Normal
L2	1.40		40	1.35	Light
→ L2 (2nd)	1.42		40	1.35	Normal
→ → L2 (3rd)	1.45		40	1.25	Special
Transform Attack	1.00		20 (+X)	1.50	Light
Plunge Attack	1.45		55	1.45	Massive	press R1 or R2 while falling to execute
Plunge Attack (2nd hit)	1.45		-	0.00	Normal	Plunge (AoE)

Note: Damage Multiplier data from official guide checked with http://darksouls2verificationdata.web.fc2.com/motion-bloodborne.html for correction after patch 1.09.

Feb 2022 Update: All attack properties (damage multiplier, damage type, stamina cost & attack impact) verified with datamined game files and added rally values for each attack.

Attack: Attacks are named for the input command required to execute them.

Attack Damage Multipliers: Each attack has a different multiplier. Your attack's power is equal to the attack power of your weapon times this multiplier. Higher multipliers mean stronger attacks.

Type: Damage type determines which gems will boost your attack and which defense the enemy will use to reduce the damage. If multiple types are listed, the attack has two separate damage components that are calculated separately.

Stamina: Each attack costs a different amount of stamina. Numbers in parentheses indicate the cost of the additional action required to execute the attack. For example, a backstep attack requires a backstep, which costs 10 stamina.

Impact: When you hit an enemy, it will be stunned momentarily. Impact is an assessment of how heavy the stun will be. The scale is Light > Normal > Heavy > Massive. Attacks with Massive Impact often cause knockdowns.

Key
Damage	Requirements	Stat Bonuses	Special Attack
The Damage stat dictates how much damage the weapon does. The Damage stats for a weapon are V / W / X / Y / Z: V is Physical damage W is Blood damage X is Arcane damage Y is Fire damage Z is Bolt damage	The Requirements determines how high various Stats must be in order to wield the weapon effectively. The Requirement stats for a weapon are W / X / Y / Z: W is the Strength required X is the Skill required Y is the Bloodtinge required Z is the Arcane required	The Stat Bonuses rating indicates the level of bonus you receive based on the associated Stat when you use a weapon. This rating can be S , A , B , C , D , or E (in order from most to least bonus for the associated stat). For more information about the scaling as a whole and its values visit the Scaling wiki page.	The special attack attributes for a weapon are W / X / Y / Z: W is the Slow Poison attack X is the Rapid Poison attack Y is the VS. Kin attack Z is the VS. Beasts attack