Bob's Brain

### 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  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.
* Familiars that follow behind Isaac have a certain priority in how close their position is to him over other familiars, with Bob's Brain having 5th priority.

## Synergies

* : The impact damage is increased to 7 and the explosion deals an additional 25 damage.
* : The explosion deals an additional 85/50 damage.

## Interactions

	+ - The poison effect of Bob's curse is applied which deals only 2 ticks of damage, resulting in inflicting halved damage.
	+ - Spiders do not spawn, however the explosion leaves behind a puddle of slowing creep.
* : 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 + : Explosion damages are increased to 1.25x, which are 46.875/93.75 each.
		- Bomber Boy + : Explosion damages are increased to 1.5x, which are 56.25/112.5 each.
		- Bomber Boy +  + : Explosion damages are increased to 1.75x, which are 65.625/131.25 each.
* : Bob's Brain stays in place relative to Isaac until it is fired.
* / : Bob's Brain will explode upon hitting an enemy that has been turned into poop.
	+ Bob's Brain no longer explodes upon hitting poops made from enemies.

## 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.