Kos Parasite — Bloodborne

Kos Parasite — Weapons, Bloodborne. Explore the sourced guide, practical details and related entries. Free access.

Kos Parasite

Stats and requirements

AttributeValue
Arcane required20
Quicksilver Bullets per use2
Durability600
Temporary buffsNo
Base rally30 ( no upgrade )

Build affinities

AttributeValue
Attributes recommended by the wikiArcane
Elemental conversionNo

Base damage · weapon +0

Damage typeValue
Physical-
Blood-
Arcane30
Fire-
Bolt-

Published base power, before attribute bonuses, gems and the target's defence. Wiki damage types: (Arcane).

Purchase · prices and conditions

MerchantDaytimeEveningNightBlood MoonNG+SellCondition
Bath Messengers [ Hunter's Dream ]--60000600006000018000Kos Parasite
Chalice Bath Messengers [ Chalice Dungeons Common ]--600006000060000-Kos Parasite
Patches, the Spider [ Chalice Dungeons Rare ]--600006000060000-Kos Parasite

Upgrades · damage and rally

UpgradeRegainArcane
+03030
+13333
+23636
+33939
+44242
+54545
+64848
+75151
+85454
+95757
+106060

Rally: base recoverable HP; the multiplier for the specific attack is then applied.

Upgrades · attribute scaling

UpgradeStrengthSkillBloodtingeArcane
+0---A
+1---A
+2---S
+3---S
+4---S
+5---S
+6---S
+7---S
+8---S
+9---S
+10---S

Upgrades · materials and costs

UpgradeSlotsShardsTwin shardsChunksRocksEchoes
+00 / 3-----
+11 / 33---180
+21 / 35---220
+32 / 38---260
+42 / 3-3--300
+52 / 3-5--360
+63 / 3-8--400
+73 / 3--3-440
+83 / 3--5-480
+93 / 3--8-520
+103 / 3---1560

Each row shows the cost of that upgrade level, not the cumulative total.

Attribute scaling · exact coefficients

UpgradeStrengthSkillBloodtingeArcane
+00.000.000.001.00
+10.000.000.001.06
+20.000.000.001.12
+30.000.000.001.18
+40.000.000.001.24
+50.000.000.001.30
+60.000.000.001.36
+70.000.000.001.42
+80.000.000.001.48
+90.000.000.001.54
+100.000.000.001.60

A coefficient does not directly give final damage. The bonus also depends on the attribute level and base damage.

Attacks · normal form (Milkweed rune)

AttackDMG XTypeEnduranceRally ×ImpactCondition / detail
R12.00Arcane241.00Normal
→ R1 (2e)2.10Arcane241.10Heavy
→ → R1 (3e)2.20Arcane241.20Heavy
R1 (backstep)1.50Arcane18 (+10)0Normalprojectile vomits forward; inflicts 70 Slow Poison buildup
R1 (roll)1.00 + 1.70Arcane18 (+10)0.3 + 0.7Normal
R1 (forward quickstep)1.00 + 1.70Arcane18 (+10)0.3 + 0.7Normal
R1 (side quickstep)1.00 + 1.70Arcane18 (+10)0.3 + 0.7Normal
R1 (running)2.10Arcane28 (+X)1.10Normal
R22.35Arcane401.50Heavy
R2 (charged)1.00 + 2.70Arcane500.3 + 1.7Heavycontinuously hold the button to execute
R2 (backstep)2.20Arcane32 (+10)1.20Heavy
R2 (running)1.00 + 2.35Arcane44 (+X)0.3 + 1.0Heavy
R2 (forward jump)2.45Arcane502.50Normaltap forward on the stick just as you press R2 to execute
Transform Attack2.20Arcane28 (+X)2.00Heavypress L1 while performing another action to execute; forced Guard Break
Plunge Attack2.45Arcane502.50Massivepress R1 or R2 while falling to execute
Plunge Attack (2nd hit)1.60Blunt / Arcane-0.00NormalPlunge (AoE)

Damage × and rally × are multipliers specific to each attack. The listed conditions determine when they apply.

Attacks · transformed form (Milkweed rune)

AttackDMG XTypeEnduranceRally ×ImpactCondition / detail
R12.10Arcane281.00Normal
→ R1 (2e)2.10Arcane281.10Heavy
→ → R1 (3e)2.35Arcane281.50Heavy
R1 (backstep)1.50Arcane18 (+10)0Normalprojectile vomits forward; inflicts 70 Slow Poison buildup
R1 (roll)2.05Arcane22 (+10)1.00Heavyquick surprise attack
R1 (forward quickstep)2.05Arcane22 (+10)1.00Heavy
R1 (side quickstep)2.05Arcane22 (+10)1.00Heavy
R1 (running)2.20Arcane32 (+X)1.20Normal
R22.50Arcane561.50Heavy
R2 (2nd hit)2.90Arcane722.00Heavy
R2 (backstep)2.40Arcane44 (+10)1.40Heavy
R2 (running)1.10 + 2.50Arcane60 (+X)0.3 + 1.2Heavygood range and damage
R2 (forward jump)2.50Arcane562.50Heavytap forward on the stick just as you press R2 to execute
L20.90Arcane1000Nonelarge area of affect attack; uses 2 bullets
L2 (2nd hit)1.10Arcane00Nonesecond hit
L2 (3rd hit)1.10Arcane00Lightthird hit
L2 (4th hit)3.20Arcane00Heavyfourth hit
Transform Attack2.00Arcane240Normalpress L1 while performing another action to execute; forced Guard Break; shoots 15 projectiles
Plunge Attack1.45Arcane562.50Massivepress R1 or R2 while falling to execute
Plunge Attack (2nd hit)1.60Blunt / Arcane-0.00NormalPlunge (AoE)

Damage × and rally × are multipliers specific to each attack. The listed conditions determine when they apply.

Attacks · normal form (Fists / Kos Parasite)

AttackDMG XTypeEnduranceRally ×ImpactCondition / detail
R11.00Physical (Fists) Arcane (Kos)151.00Light
→ R1 (2e)1.02Physical (Fists) Arcane (Kos)171.00Light
→ → R1 (3e)1.05Physical (Fists) Arcane (Kos)201.00Light
→ → → R1 (4e)1.07Physical (Fists) Arcane (Kos)221.00Light
→ → → → R1 (5e)1.10Physical (Fists) Arcane (Kos)251.00Light
R1 (backstep)0.95Physical (Fists) Arcane (Kos)20 (+10)1.00Light
R1 (roll)0.95Physical (Fists) Arcane (Kos)15 (+10)1.25Light
R1 (forward quickstep)0.95Physical (Fists) Arcane (Kos)15 (+10)1.25Light
R1 (side quickstep)0.95Physical (Fists) Arcane (Kos)15 (+10)1.10Light
R1 (running)1.10Physical (Fists) Arcane (Kos)20 (+X)1.25Light
R21.25Physical (Fists) Arcane (Kos)301.30Light
R2 (charged)1.45Physical (Fists) Arcane (Kos)451.30Normal
R2 (backstep)1.20Physical (Fists) Arcane (Kos)30 (+10)1.25Normal
R2 (running)1.30Physical (Fists) Arcane (Kos)35 (+X)1.25Normal
R2 (forward jump)1.40Physical (Fists) Arcane (Kos)401.45Normal
Transform Attack1.20Physical (Fists) Arcane (Kos)20 (+X)1.50Normal
Plunge Attack1.45Physical (Fists) Arcane (Kos)501.45Massivepress R1 or R2 while falling to execute
Plunge Attack (2nd hit)1.45Physical (Fists) Arcane (Kos)-0.00NormalPlunge (AoE)

Damage × and rally × are multipliers specific to each attack. The listed conditions determine when they apply.

Attacks · transformed form (Fists / Kos Parasite)

AttackDMG XTypeEnduranceRally ×ImpactCondition / detail
R11.20Physical (Fists) Arcane (Kos)201.2Light
→ R1 (2e)1.22Physical (Fists) Arcane (Kos)221.20Light
→ → R1 (3e)1.25Physical (Fists) Arcane (Kos)251.20Light
→ → → R1 (4e)1.27Physical (Fists) Arcane (Kos)271.20Light
→ → → → R1 (5e)1.30Physical (Fists) Arcane (Kos)301.10Light
R1 (backstep)1.15Physical (Fists) Arcane (Kos)20 (+10)1.20Light
R1 (roll)1.15Physical (Fists) Arcane (Kos)20 (+10)1.25Light
R1 (forward quickstep)1.15Physical (Fists) Arcane (Kos)20 (+10)1.00Light
R1 (side quickstep)1.15Physical (Fists) Arcane (Kos)20 (+10)1.10Light
R1 (running)1.25Physical (Fists) Arcane (Kos)25 (+X)1.15Light
R21.42Physical (Fists) Arcane (Kos)402.00Normal
R2 (charged)2.00Physical (Fists) Arcane (Kos)552.50Heavy
R2 (backstep)1.35Physical (Fists) Arcane (Kos)40 (+10)1.25Normal
R2 (running)1.45Physical (Fists) Arcane (Kos)40 (+X)1.35Normal
R2 (forward jump)1.50Physical (Fists) Arcane (Kos)401.45Normal
L21.40Physical (Fists) Arcane (Kos)401.35Light
→ L2 (2e)1.42Physical (Fists) Arcane (Kos)401.35Normal
→ → L2 (3e)1.45Physical (Fists) Arcane (Kos)401.25Special
Transform Attack1.00Physical (Fists) Arcane (Kos)20 (+X)1.50Normal
Plunge Attack1.45Physical (Fists) Arcane (Kos)551.45Massivepress R1 or R2 while falling to execute
Plunge Attack (2nd hit)1.45Physical (Fists) Arcane (Kos)-0.00NormalPlunge (AoE)

Damage × and rally × are multipliers specific to each attack. The listed conditions determine when they apply.

Gems · variants

VariantGem slots
Kos ParasiteRadial · Waning · Radial
Uncanny Kos ParasiteRadial · Triangle · Radial
Lost Kos ParasiteRadial · Triangle · Waning

Variants change the gem slots; the upgrade table retains the weapon’s stats.

Acquisition · wiki details

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 ]

Attribute scaling · attack-specific behavior

If parasite is used without Milkweed Rune, it deals arcane damage if hit with Kos Parasite instead of fists.

Stats and requirements

AttributeValue
Arcane required20
Quicksilver Bullets per use2
Durability600
Temporary buffsNo
Base rally30 ( no upgrade )

Build affinities

AttributeValue
Attributes recommended by the wikiArcane
Elemental conversionNo

Base damage · weapon +0

Damage typeValue
Physical-
Blood-
Arcane30
Fire-
Bolt-

Published base power, before attribute bonuses, gems and the target's defence. Wiki damage types: (Arcane).

Purchase · prices and conditions

MerchantDaytimeEveningNightBlood MoonNG+SellCondition
Bath Messengers [ Hunter's Dream ]--60000600006000018000Kos Parasite
Chalice Bath Messengers [ Chalice Dungeons Common ]--600006000060000-Kos Parasite
Patches, the Spider [ Chalice Dungeons Rare ]--600006000060000-Kos Parasite

Upgrades · damage and rally

UpgradeRegainArcane
+03030
+13333
+23636
+33939
+44242
+54545
+64848
+75151
+85454
+95757
+106060

Rally: base recoverable HP; the multiplier for the specific attack is then applied.

Upgrades · attribute scaling

UpgradeStrengthSkillBloodtingeArcane
+0---A
+1---A
+2---S
+3---S
+4---S
+5---S
+6---S
+7---S
+8---S
+9---S
+10---S

Upgrades · materials and costs

UpgradeSlotsShardsTwin shardsChunksRocksEchoes
+00 / 3-----
+11 / 33---180
+21 / 35---220
+32 / 38---260
+42 / 3-3--300
+52 / 3-5--360
+63 / 3-8--400
+73 / 3--3-440
+83 / 3--5-480
+93 / 3--8-520
+103 / 3---1560

Each row shows the cost of that upgrade level, not the cumulative total.

Attribute scaling · exact coefficients

UpgradeStrengthSkillBloodtingeArcane
+00.000.000.001.00
+10.000.000.001.06
+20.000.000.001.12
+30.000.000.001.18
+40.000.000.001.24
+50.000.000.001.30
+60.000.000.001.36
+70.000.000.001.42
+80.000.000.001.48
+90.000.000.001.54
+100.000.000.001.60

A coefficient does not directly give final damage. The bonus also depends on the attribute level and base damage.

Attacks · normal form (Milkweed rune)

AttackDMG XTypeEnduranceRally ×ImpactCondition / detail
R12.00Arcane241.00Normal
→ R1 (2e)2.10Arcane241.10Heavy
→ → R1 (3e)2.20Arcane241.20Heavy
R1 (backstep)1.50Arcane18 (+10)0Normalprojectile vomits forward; inflicts 70 Slow Poison buildup
R1 (roll)1.00 + 1.70Arcane18 (+10)0.3 + 0.7Normal
R1 (forward quickstep)1.00 + 1.70Arcane18 (+10)0.3 + 0.7Normal
R1 (side quickstep)1.00 + 1.70Arcane18 (+10)0.3 + 0.7Normal
R1 (running)2.10Arcane28 (+X)1.10Normal
R22.35Arcane401.50Heavy
R2 (charged)1.00 + 2.70Arcane500.3 + 1.7Heavycontinuously hold the button to execute
R2 (backstep)2.20Arcane32 (+10)1.20Heavy
R2 (running)1.00 + 2.35Arcane44 (+X)0.3 + 1.0Heavy
R2 (forward jump)2.45Arcane502.50Normaltap forward on the stick just as you press R2 to execute
Transform Attack2.20Arcane28 (+X)2.00Heavypress L1 while performing another action to execute; forced Guard Break
Plunge Attack2.45Arcane502.50Massivepress R1 or R2 while falling to execute
Plunge Attack (2nd hit)1.60Blunt / Arcane-0.00NormalPlunge (AoE)

Damage × and rally × are multipliers specific to each attack. The listed conditions determine when they apply.

Attacks · transformed form (Milkweed rune)

AttackDMG XTypeEnduranceRally ×ImpactCondition / detail
R12.10Arcane281.00Normal
→ R1 (2e)2.10Arcane281.10Heavy
→ → R1 (3e)2.35Arcane281.50Heavy
R1 (backstep)1.50Arcane18 (+10)0Normalprojectile vomits forward; inflicts 70 Slow Poison buildup
R1 (roll)2.05Arcane22 (+10)1.00Heavyquick surprise attack
R1 (forward quickstep)2.05Arcane22 (+10)1.00Heavy
R1 (side quickstep)2.05Arcane22 (+10)1.00Heavy
R1 (running)2.20Arcane32 (+X)1.20Normal
R22.50Arcane561.50Heavy
R2 (2nd hit)2.90Arcane722.00Heavy
R2 (backstep)2.40Arcane44 (+10)1.40Heavy
R2 (running)1.10 + 2.50Arcane60 (+X)0.3 + 1.2Heavygood range and damage
R2 (forward jump)2.50Arcane562.50Heavytap forward on the stick just as you press R2 to execute
L20.90Arcane1000Nonelarge area of affect attack; uses 2 bullets
L2 (2nd hit)1.10Arcane00Nonesecond hit
L2 (3rd hit)1.10Arcane00Lightthird hit
L2 (4th hit)3.20Arcane00Heavyfourth hit
Transform Attack2.00Arcane240Normalpress L1 while performing another action to execute; forced Guard Break; shoots 15 projectiles
Plunge Attack1.45Arcane562.50Massivepress R1 or R2 while falling to execute
Plunge Attack (2nd hit)1.60Blunt / Arcane-0.00NormalPlunge (AoE)

Damage × and rally × are multipliers specific to each attack. The listed conditions determine when they apply.

Attacks · normal form (Fists / Kos Parasite)

AttackDMG XTypeEnduranceRally ×ImpactCondition / detail
R11.00Physical (Fists) Arcane (Kos)151.00Light
→ R1 (2e)1.02Physical (Fists) Arcane (Kos)171.00Light
→ → R1 (3e)1.05Physical (Fists) Arcane (Kos)201.00Light
→ → → R1 (4e)1.07Physical (Fists) Arcane (Kos)221.00Light
→ → → → R1 (5e)1.10Physical (Fists) Arcane (Kos)251.00Light
R1 (backstep)0.95Physical (Fists) Arcane (Kos)20 (+10)1.00Light
R1 (roll)0.95Physical (Fists) Arcane (Kos)15 (+10)1.25Light
R1 (forward quickstep)0.95Physical (Fists) Arcane (Kos)15 (+10)1.25Light
R1 (side quickstep)0.95Physical (Fists) Arcane (Kos)15 (+10)1.10Light
R1 (running)1.10Physical (Fists) Arcane (Kos)20 (+X)1.25Light
R21.25Physical (Fists) Arcane (Kos)301.30Light
R2 (charged)1.45Physical (Fists) Arcane (Kos)451.30Normal
R2 (backstep)1.20Physical (Fists) Arcane (Kos)30 (+10)1.25Normal
R2 (running)1.30Physical (Fists) Arcane (Kos)35 (+X)1.25Normal
R2 (forward jump)1.40Physical (Fists) Arcane (Kos)401.45Normal
Transform Attack1.20Physical (Fists) Arcane (Kos)20 (+X)1.50Normal
Plunge Attack1.45Physical (Fists) Arcane (Kos)501.45Massivepress R1 or R2 while falling to execute
Plunge Attack (2nd hit)1.45Physical (Fists) Arcane (Kos)-0.00NormalPlunge (AoE)

Damage × and rally × are multipliers specific to each attack. The listed conditions determine when they apply.

Attacks · transformed form (Fists / Kos Parasite)

AttackDMG XTypeEnduranceRally ×ImpactCondition / detail
R11.20Physical (Fists) Arcane (Kos)201.2Light
→ R1 (2e)1.22Physical (Fists) Arcane (Kos)221.20Light
→ → R1 (3e)1.25Physical (Fists) Arcane (Kos)251.20Light
→ → → R1 (4e)1.27Physical (Fists) Arcane (Kos)271.20Light
→ → → → R1 (5e)1.30Physical (Fists) Arcane (Kos)301.10Light
R1 (backstep)1.15Physical (Fists) Arcane (Kos)20 (+10)1.20Light
R1 (roll)1.15Physical (Fists) Arcane (Kos)20 (+10)1.25Light
R1 (forward quickstep)1.15Physical (Fists) Arcane (Kos)20 (+10)1.00Light
R1 (side quickstep)1.15Physical (Fists) Arcane (Kos)20 (+10)1.10Light
R1 (running)1.25Physical (Fists) Arcane (Kos)25 (+X)1.15Light
R21.42Physical (Fists) Arcane (Kos)402.00Normal
R2 (charged)2.00Physical (Fists) Arcane (Kos)552.50Heavy
R2 (backstep)1.35Physical (Fists) Arcane (Kos)40 (+10)1.25Normal
R2 (running)1.45Physical (Fists) Arcane (Kos)40 (+X)1.35Normal
R2 (forward jump)1.50Physical (Fists) Arcane (Kos)401.45Normal
L21.40Physical (Fists) Arcane (Kos)401.35Light
→ L2 (2e)1.42Physical (Fists) Arcane (Kos)401.35Normal
→ → L2 (3e)1.45Physical (Fists) Arcane (Kos)401.25Special
Transform Attack1.00Physical (Fists) Arcane (Kos)20 (+X)1.50Normal
Plunge Attack1.45Physical (Fists) Arcane (Kos)551.45Massivepress R1 or R2 while falling to execute
Plunge Attack (2nd hit)1.45Physical (Fists) Arcane (Kos)-0.00NormalPlunge (AoE)

Damage × and rally × are multipliers specific to each attack. The listed conditions determine when they apply.

Gems · variants

VariantGem slots
Kos ParasiteRadial · Waning · Radial
Uncanny Kos ParasiteRadial · Triangle · Radial
Lost Kos ParasiteRadial · Triangle · Waning

Variants change the gem slots; the upgrade table retains the weapon’s stats.

Acquisition · wiki details

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 ]

Attribute scaling · attack-specific behavior

If parasite is used without Milkweed Rune, it deals arcane damage if hit with Kos Parasite instead of fists.

Source : Bloodborne Wiki · CC BY-SA 3.0