While holding this trinket, if there's another familiar that follows Isaac's Head, dropping this trinket will move the familiar to the first familiar slot.
This resets upon quitting and re-entering the game.
This is useful with familiars that are more effective when closer to Isaac, such as Lil Brimstone and Incubus.
Familiars that follow behind Isaac have a certain priority in how close their position is to him over other familiars, with Isaac's Head having 5th priority. Lil Brimstone and Incubus have higher priority and are therefore always closer to Isaac.
The head shoots once per second.
The head shoots once every 3/4ths of a second.
Lil Brimstone and 
Incubus.
??? as Isaac.
Isaac Unlocks 
Boss Rush Unlocks 
The Binding of Isaac: Rebirth
