Trinkets

Trinkets are a type of passive item that can be picked up and dropped at will added in The Binding of Isaac: Wrath of the Lamb expansion. The ability to drop trinkets after picking them up was added in The Binding of Isaac: Rebirth. The Tick trinket, however, is still permanent once picked up. Trinkets add passive bonuses to the player, but can only be held one at a time, unless the item Mom's Purse is collected. This item allows two trinkets to be held at once, though they cannot both be the same trinket.

List of Trinkets
Cain's Eye  May You See Your Destination  When Starting A Floor, 25% Chance To Get The The Compass Effect For The Duration Of a floor.