Mom's Key

Mom's Key is a passive item.

Effects

 * Gives Isaac two keys.
 * If a non-Red Chest spawns hearts, coins, bombs and/or keys, causes the chest to spawn a second group of said pickups, effectively doubling the average pickup yield.

Trivia

 * Mom's Key is the first item, by ID number, that was not carried over from Wrath of the Lamb.
 * The appearance of Mom's Key is a reference to Bowser's boss key in Super Mario 64 as well as the Boss Key in various Legend of Zelda games.
 * Prior to Repentance, this item's description was "Less is now more +2 keys".