Bomber Boy

Bomber Boy is a passive item added in The Binding of Isaac: Afterbirth.

Effects

 * Grants 5 bombs.
 * Causes bombs to explode in a large cross-shaped blast by adding two additional explosions in each cardinal direction.
 * The damage for a single explosion is unchanged, but each successive explosion that hits the same enemy has its damage halved. The damage per successive explosion is: 60, 30, 15, 7.5, 3.75, 1.875, 0.9375, 0.46875, 0.234375
 * The damage for a single explosion is 0.75x times its normal damage, resulting in 75 damage per explosion. Each successive explosion that hits the same enemy has its damage halved. The damage per successive explosion is: 75, 37.5, 18.75, 9.375, 4.6875, 2.34375, 1.171875, 0.5859375, 0.29296875.
 * changes the explosions' base damage to 110/185, with the same damage reductions as above.

Synergies

 * : Bomber Boy affects the explosion from Bob's Brain.
 * : Bomber Boy affects the bombs fired by Dr. Fetus.
 * : Bomber Boy affects the missiles' explosions from Epic Fetus, with the explosions' multiplier resulting in 15 times Isaac's damage per explosion. Unlike with regular bombs, Bomber Boy won't decrease the damage from each of the missile's successive explosions, drastically increasing damage.
 * : All explosions deal more damage, have a larger radius and will overlap each other more, potentially vastly increasing damage. Caution should be exercised, as the explosions' increased radius make self-damage likely.
 * : Each explosion releases 10 tears in all directions.

Interactions

 * //Locust of War: Explosion damage is halved with no additional explosions.
 * : Epic Fetus explosions are unaffected.
 * : Ipecac explosions are unaffected.

Trivia

 * Bomber Boy is a reference to the 1983 video-game Bomberman.
 * As of Repentance, the bomb's appearance when using this item also references how bombs look in Bomberman.
 * Before Repentance, the item's quote was "Explosive blast!".

Seeds
YZLQ WLAV (Treasure Room adjacent to spawn on Normal, just to the left of spawn on Hard)