Thorny Rock is a trinket in Fiend Folio, a mod for The Binding of Isaac.

Upon taking damage, creates a short-ranged rock wave that deals 10 damage per tick to nearby enemies.

Does not work in cleared rooms, or when taking self-damage.

The following special synergies and interactions for Thorny Rock 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.