Monster Blood
Emits deadly ooze when damaged. This canister contains a sample of dangerous monster blood, collected by Médecins Sans Diplôme for study.
Sell Creep Price21Description
Monster Blood is a passive item .
Effects
- Taking damage spawns a pool of poison goop.
- Grants immunity to poison.
- Grants a heart container.
Synergies
If the player also has 
Decoy , the Decoy creates a large poison pool when attacked.
If the player also has 
Explosive Decoy , the Explosive Decoy explodes and creates a large poison pool when attacked.
If the player also has 
Shotgrub , Shotgrub's bullets will home in on enemies.
If the player also has 
Evolver , it evolves after every 3 unique enemy types killed instead of 5.
If the player also has 
Plague Pistol , the pistol turns into the Pandemic Pistol, turning red with an increased ammo capacity, and its bullets become linked like 
VertebraeK-47 's bullets.
If the player also has 
Mutation , Mutation will poison enemies damaged by it.
Notes
- Like all heart container items, The Robot will receive 5 to 10 instead.
- Prior to the Supply Drop Update , Monster Blood did not grant a heart container and had a different icon.
- On the Switch version, and Windows/Mac Steam versions (possibly Linux too?), the accented characters in the Ammonomicon entry won't show up, instead reading "Mdecins Sans Diplme".
Trivia
- This item may be a reference to the book Monster Blood, the third title in the original Goosebumps series, written by R. L. Stine. In the books, Monster Blood came in a twist-to-open can.
- "Médecins Sans Diplôme" is French for "Doctors Without Diplomas", and is a reference to Médecins Sans Frontières , the global humanitarian organization born in France and known in English as Doctors Without Borders.
Unlock Method
Purchase from 
Professor Goopton for 5 .