Yin-Yang Orb is a trinket in Fiend Folio, a mod for The Binding of Isaac.

Grants a luck-based chance to fire an amulet tear that deals 1.25x Isaac's damage and has a very high homing effect, similar to Dichromatic Butterfly.

The chance to fire an amulet tear starts at 16.67% with 0 luck, and goes up to 63.33% with 7 luck. The formula used is random(0, x) < 5 + (luck × 2), where x = 20.

The following special synergies and interactions for Yin-Yang Orb have been documented.

* Note that not all possible synergies and interactions are listed here.

• Check out the trinket description on the mod's external Wiki.
• Download Fiend Folio from the Steam Workshop.