Dark Bum

Dark Bum is a passive item.

Effects

 * Spawns a familiar that follows Isaac around and collects Red Hearts. (He does not fill up a familiar "slot".) For every one-and-a-half Red Hearts collected, Dark Bum will generate one of the following:
 * A single Soul Heart.
 * A hostile Spider.
 * A friendly Blue Spider.
 * A single Black Heart.
 * A random pill, card, or rune.



Synergies

 * : Each Half Red Heart dropped by Little C.H.A.D. can be collected by Dark Bum, increasing the amount of pickups dropped.
 * : Enemy kills have the chance to drop Half Red Hearts that can be collected by Dark Bum, which when combined with Gimpy's chance to drop Soul Hearts when Isaac is damaged is a good way to generate Soul and Black Hearts as well as other pickups.
 * : Dark Bum's dropped card will always be Ace of Spades.
 * : Most red heart drops will become double red heart drops. This counts as two full red hearts for Dark Bum, essentially doubling the value of it. The black hearts dropped from Dark Bum can be doubled as well.

Interactions

 * : No effect, but familiar is bigger.

Trivia

 * Back when Rebirth was released, and well after, Dark Bum was (and may still be) considered by many as one of the best defensive/healing items in the game. The sheer amount of red hearts converted into soul hearts far surpassed the need of having red heart containers. As the bum got nerfed over time, so has its popularity dropped, too.

History

 * v1.02: Dark Bum's Red to Soul Heart conversion rate was set to 1.5:1.
 * v1.031: Dark Bum was changed to have a chance to spawn friendly Blue Spiders or hostile Spiders.
 * v1.06.J796: Dark Bum can no longer be found by Tainted Lost.

Seeds
WBEG Q22R (Treasure Room adjacent to spawn) CS9M XL2P (Treasure Room adjacent to spawn) AL07 13JY (Treasure Room adjacent to spawn) 7276 4P61 (Treasure Room adjacent to spawn) EVQ8 P80Q (Treasure Room adjacent to spawn) VYNW SA7F (Treasure Room left from spawn)