Chaos Card

The Chaos Card is a Special Card.

Effects

Upon activation, Isaac throws the card in front of himself.
- The card is thrown in the direction Isaac's body is facing, meaning the card will be thrown in the direction Isaac is moving. If he is stationary, it will be thrown in the last direction that Isaac moved.
The thrown card kills anything in its path (including end-game Bosses like ??? and otherwise indestructible entities like Stone Grimaces and moving spikes) and gets stuck in the ground/wall after being thrown.
- The only exception to this is Delirium.
The card can open doors as if a bomb had exploded them, although it can not open any locked doors or open the big door in the starting room of Dark Room and The Chest.
The card can extinguish fires and break rocks, potentially revealing Crawl Spaces.

Using it on multi-phase bosses like Isaac, ??? and The Lamb will instantly end the boss fight.
- Using it on Satan during his first form will end the fight, despite him having multiple forms and health bars. Using it on The Fallen instead of Satan himself will not end the fight.
  - However, using it on Mega Satan will only skip one phase.
- However, it will do absolutely nothing towards Delirium, as it is the only enemy immune to chaos card; the card will simply disappear.
- It will only kill one phase of Hush unless you throw it from the bottom side.
- It will only kill one phase of Ultra Greed in Greedier Mode.
To aim the card correctly, make sure to move in the direction that it needs to be thrown; shooting in a direction will not fire it in that direction.
Does not kill Beggars or shop keepers.
Can kill normally indestructible enemies like the Masks of Mask + Hearts (though this will not kill the heart), Hosts while they're invulnerable, the little chubs in Chubbers, and Death's Heads. It can also be used to kill things typically not considered alive like moving spike blocks and Stone Grimaces.
The Chaos Card can also open secret rooms if you don't have a spare bomb.
If it is used against Scolex while he's jumping, it will not instantly kill him and will instead cut off the bottom of his tail, dealing some damage. Although his weak point will no longer be visible, he will still be vulnerable.

Angelic Prism: If the Chaos Card passes through the prism, it will replicate the Chaos Card four times each in their respective colors.
Blank Card: Allows for an easy run by allowing unlimited usage of the card.
- Items such as Habit, 9 Volt, and Charged Baby give more opportunities to use the card since all these items decrease the charge time of Blank Card.
- The Battery allows Blank Card to be used twice in a room, allowing multi-phase bosses to be killed instantly.

PC GRTC 0GFD (Dropped by clearing the room to the right and down from spawn) (Normal mode only)

PC L29V FZNC (Spawned by Box that is dropped by the boss, Blank Card in the first floor treasure room)

PC 7BT6 72CX (Dropped by defeating the mini-boss directly north of spawn)

PC STW4 3CBE (Found between spikes in a room directly north of spawn)

The icon, name and functionality are all a reference to the Magic: The Gathering card Chaos Orb. This card is famous for its unusual effect: the card is flipped from a height of over one foot above the board and all cards it touches as it lands are destroyed.