Bob's Brain

Item Icon
Pickup Quote	"Explosive thoughts"
Entity ID	5.100.273
Item Pool	Golden Chest Baby Shop Rotten Beggar Treasure Room Golden Chest Treasure Room
Quality	1
Item Tags
Collection Grid	(page 3, column 8, row 7) (page 3, column 8, row 2) (page 3, column 9, row 2)

Bob's Brain is a passive item.

Effects

• Spawns a floating brain familiar that can be fired towards enemies as a projectile.
  • Bob's Brain is fired directly from where Isaac is standing.
  • Bob's Brain is fired directly from where it is located in the chain of familiars behind Isaac, making aiming it slightly more difficult.
• If it hits an enemy, it deals 3.5 damage and explodes, further damaging and poisoning monsters.
  • The explosion deals 60 damage. The poison deals double Isaac's Damage over time.
  • The explosion deals 100 damage. The poison damage is dealt 4 times, inflicting Isaac's Damage per tick.
  • The explosion ignores armor.
• The explosion can hurt Isaac, dealing a full heart of damage.
  • This can make picking up the item a risky choice, as Bob's Brain will always fire, regardless of whether or not Isaac will be caught in the explosion.
• Once it explodes, it takes a few seconds to re-appear.
• This item belongs to the Bob set. Collecting three items from this set will transform Isaac into Bob.

Notes

• Bob's Brain is affected by most bomb modifiers.
• Bob's Brain only explodes when hitting an enemy, and does not explode upon hitting a fire, poop, or wall. It can destroy poops and fires like normal shots, however.
• Bob's Brain never launches immediately upon entering a room unless a tear-firing key is released and pressed again, or until several seconds have passed.
• It is possible to get multiple Bob's Brains to spawn on the same floor by finding one in a Locked Chest and not taking it
  • Only one copy of the brains will be active at a given time, with another one firing immediately after the first has exploded or starts to return from a miss.
  • Multiple copies of Bob's Brain will float in the same spot in the familiar line.
  • Each copy takes up their spot on the familiar line, but only the first one launches out. Respawning brains may end up stacking on top of each other.

Synergies

• BFFS!: The impact damage is increased to 7 and the explosion deals an additional 25 damage.
• Mr. Mega: The explosion deals an additional 85/50 damage.

Interactions

• Effects applied as normal:
  • Blood Bombs
  • Brimstone Bombs
  • Butt Bombs
  • Glitter Bombs
  • Hot Bombs
  • Nancy Bombs
  • Sad Bombs
• No effect:
  • Bobby-Bomb
  • Bob's Curse
    • The poison effect of Bob's curse is applied which deals only 2 ticks of damage, resulting in inflicting halved damage.
  • Fast Bombs
  • Ghost Bombs
  • Rocket in a Jar
  • Scatter Bombs
  • Sticky Bombs

• Bomber Boy: No cross explosions. Damage from the explosion is halved against the initial target, but others caught in the blast take full damage.
  • Explodes in a cross-shaped pattern. Damage from the main explosion deals a flat 37.5 damage, and any additional explosion deals flat 75 damage to which Bomber boy's damage reduction is not applied.
    • Bomber Boy + BFFS!: Explosion damages are increased to 1.25x, which are 46.875/93.75 each.
    • Bomber Boy + Mr. Mega: Explosion damages are increased to 1.5x, which are 56.25/112.5 each.
    • Bomber Boy + BFFS! + Mr. Mega: Explosion damages are increased to 1.75x, which are 65.625/131.25 each.
• Duct Tape: Bob's Brain stays in place relative to Isaac until it is fired.
• E. Coli / Flush!: Bob's Brain will explode upon hitting an enemy that has been turned into poop.

Trivia

• Three copies of this item are used in BRAINS! (challenge #27).
• In a Twitter AMA, Edmund McMillen mentioned that Bob's Brain is his favorite item from The Binding of Isaac.

The Binding of Isaac: Rebirth
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