Item: Marbles

Grants spectral tears that travel through obstacles (but not enemies) instead of breaking on impact with them.

Sets your key count to the maximum of 99.

Isaac is followed by a small blue cross that will drop a Soul Heart every 4 rooms.

Isaac's tears gain a random effect that changes every shot.

Adds a chance to spawn blue spiders when firing tears. Restores 1 red heart.

Isaac can hold 2 pills at once and all cards are replaced by pills.

Increases damage based on how many empty heart containers Isaac has.

Grants charged tears that can be fired in a tight burst of four. Getting hit while charging will teleport Isaac into another room.

Increases range. Tears turn into bones, which shatter into 1-3 bone shards upon hitting an enemy or obstacle.

+5 bombs. Bombs stick to enemies and spawn 2-4 blue spiders if they kill an enemy.

Grants quadruple shot but decreases tears.

Tears leave a small, short lasting pool of creep on impact or when their range is depleted.

Increases damage and range while reducing shot speed and grants homing tears. Grants a Heart Container and replenishes all Red Hearts.

Spawns a familiar that will follow Isaac's movements on a 2.5 second delay. Tears that pass through the baby will be doubled and increase in speed.

Gives Isaac 5 Bombs, and causes all dropped bombs to home towards the closest enemy.

There will be 2 items available to choose from after defeating a boss. Choosing 1 item causes the other to disappear.

Grants 7 bombs and allows bombs to be placed rapidly.

Connects Isaac's tears with electricity that can damage enemies.

Spawns an egg familiar, which cracks and turns into a random charmed enemy when Isaac is hurt. The egg regenerates upon entering a different room.

Increases Damage and Speed, plus adds one Soul Heart.