Necromantic Fossil is a trinket in Fiend Folio, a mod for The Binding of Isaac.

Grants a 20% chance to spawn a bone orbital when an enemy dies.

The chance scales with luck and goes up to 40% with 20 luck.

Crush Effect: Spawns a fossil that has previously been crushed during the run, or a random fossil if there weren't any.

The following special synergies and interactions for Necromantic Fossil 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.