Binding of Isaac: Rebirth Wiki

Best Friend is an activated item.


  • Spawns a decoy vaguely resembling Isaac in his crying animation, which explodes after 5 seconds with the blast radius of a Mega Troll Bomb Mega Troll Bomb.
    • Removed in Repentance The explosion deals 110 damage.
    • Added in Repentance The explosion deals 185 damage.
  • The decoy bomb distracts enemies, as they will target the decoy instead of Isaac regardless of distance.



  • Added in RepentanceBook of Virtues Book of Virtues: Creates wisps that are small Isaac heads with a white flame in the center ring. Tears shot by these have a 7.5% of applying the mark status effect, akin to Rotten Tomato Rotten Tomato.
  • Added in AfterbirthCar Battery Car Battery: Spawns two decoys on top of each other.

In-game footage[]


  • Edmund McMillen stated that Best Friend would no longer "Die upon touch". This is a reference to a bug in the original The Binding of Isaac where, in many circumstances, Isaac could take glitched hits (often killing Isaac outright).
  • Best Friend works remarkably similar to Pipe Bombs in Left 4 Dead, down to the 5 second timer and not working on bosses.



PC XM8A ELC2 (Treasure Room Treasure Room adjacent to spawn)

PC 6VNN HAK2 (Treasure Room Treasure Room adjacent to spawn)

PC 0YRN 4TFJ (Treasure Room Treasure Room adjacent to spawn)

PC Added in Afterbirth † Normal and hard modes only LE7M GYRQ (Treasure Room Treasure Room adjacent to spawn)


Bug Bug! Gurgles, Splashers, Boils, Guts, and Sacks are immune to Best Friend's explosion.
Bug Bug! Switch Doubles when Multidimensional Baby passes through it.[citation needed]