Brother Bloody is a monster added in Revelations Chapter 1. It comes in the following variants.
Brother Bloody is a familiar type monster that orbits around other monsters. He regularly shoots a tear at the player if they are within range. When the monster that Brother Bloody was orbiting is defeated, it moves almost instantly to the next available one. Although Brother Bloodies can be defeated normally, if they are the last enemy(s) in the room, they will self destruct, sending a burst of tears out in 6 directions.
If a Brother Bloody is Friendly, it will shoot at monsters and orbit around Isaac if there are no other friendly monsters.
Brother Blizzard is the Glacier variant of Brother Bloody, and functions identically to Brother Bloody. If one is spawned from an Ice Hazard in a room devoid of enemies, it will self destruct as usual.
- Brother Bloody determines which monster to orbit based on which monster is the closest to them.
- Brother Bloody is one of the only monsters added in Revelations Chapter 1 that can be found on the main floorpath (with the others being Drifties, Puckers, and Smolycephali).
- Brother Bloody is based off of the familiar Brother Bobby.