Bombs

Pickups
Hearts	Coins	Bombs	Keys	Batteries	Pills	Cards	Runes	Objects			Chests	Sacks
Hearts	Coins	Bombs	Keys	Batteries	Pills	Cards	Runes	Glass Dice	Trial Discs	Miscellaneous Objects	Chests	Sacks

Bombs are pickups primarily used to damage enemies and bosses, destroy rocks, and open up both Secret Room walls and closed doors.

As of The Spitshine Update, Fiend Folio adds 4 new bomb pickups.

This page is about Bombs added in Fiend Folio. More information about Bombs in general can be found in the vanilla page.

Name	Description	Probability
Copper Bomb	Deals 185 damage and has an increased explosion radius. Has a 50% chance to become a dud instead of exploding. Nearby explosions cause dud Copper Bombs to explode, which deal only 100 damage.	1.00%
Double Copper Bomb	Grants two Copper Bombs.	0.1125%
Double Mixed Bomb	Grants one regular bomb and one Copper Bomb.	0.0375%
Copper Troll Bomb	Spawns primed and explodes after a short while. Deals 185 damage and has an increased explosion radius. Has a 50% chance to become a dud instead of exploding. Nearby explosions cause dud Copper Troll Bombs to explode, which deal only 100 damage.	0.01%

Copper Bomb drops have their own 11.25% chance to become a Doubled Mixed Bomb, 3.75% chance to become a Doubled Copper Bomb, or a 1% chance to become a Copper Troll Bomb.
Copper Bombs can be affected by BOGO Bombs and Humbleing Bundle as expected, turning into Double Mixed Bombs or Double Copper Bombs.
Safety Scissors will always turn Copper Troll Bombs into Copper Bomb pickups.
Giga Bombs do not synergize with Copper Bombs, and will be placed normally.
No. 2 will consume Copper Bomb charges with its effect and release Copper Butt Bombs.
Rockets from Rocket in a Jar will gain a unique appearance with Copper Bombs, but will still always explode.
Jacob & Esau will consume 2 Copper Bomb charges if they have 2 or more charges as they will place 2 bombs. This will still only use up one bomb.
Spending bombs without using them (i.e. Bomb Bum or Grid Restock Machine) will not consume Copper Bomb charges. This means Isaac can end up with 0 Bombs but still have unused charges.

Trivia

Double Copper Bombs, Double Mixed Bombs, and Copper Troll Bombs were all added in The Spitshine Update.
If a Copper Troll Bomb becomes a dud, its expression changes to one that resembles Trollge, while also playing a cartoonish "boowomp" sound.
- The "boowomp" sound effect is sampled from the TV series SpongeBob SquarePants.
Copper Bombs have a 0.0005% chance to play an applause sound if they explode.