The Binding of Isaac: Afterbirth/Additions

Items
95 new items were added in the expansion: 19 activated items and 76 passive items.

Trinkets
29 new trinkets were added in the expansion.

Chests

 * AngelChest.png Eternal Chests
 * Eternal Chests are similar in appearance to Gold Chests, except they glow bright blue instead of gold, like a soul heart. They require one key to unlock, but can be reopened a random amount of times, each time requiring another key. They can be found in Angel rooms, in I AM ERROR Rooms and rarely in a normal room. Their loot is similar to Golden Chests, but there is a 25% chance they will drop nothing upon opening. If they contain nothing or an item, they will no longer be able to be reopened.
 * SpikedChest.png Spiked Chests
 * Spiked Chests are purple colored chests with spikes protruding from them that will deal damage to Isaac upon opening unless he has the Holy Mantle active, which nullifies the damage, or if found in The Chest/Dark Room, where they are free to open. They can be rarely found upon completing a room or in greed mode shops. Their loot is similar to Brown Chests. Unlike other chests, they do not appear on the minimap.

Sacks

 * MysteryBag.png Mystery sack
 * Spawns 1-4 random pickups upon touching it. It will not drop any hearts, pills or chests, and they have an increased chance to drop batteries.

Beggars
Bomb Bums are extremely rare, and ask for bombs. Each bomb donated has a chance to have him drop 1-2 bomb pickups or an item from the Bomb Bum Item Pool. After spawning a pedestal item, the Bomb Bum will disappear and can no longer be donated to.
 * Bomb bum.png Bomb bum