The Assassin's Cerulean Dagger is a talisman you can get in Elden Ring that causes your critical attacks to restore 15 FP.

How to Get Assassin's Cerulean Dagger

The Assassin's Cerulean Dagger will drop from the Black Knife Assassin (Black Knife Catacombs) boss. The Black Knife Catacomb is in the northeast part of Liurnia of the Lakes.

Other Notes

  • Sells for 1500
  • All Colossal Weapons and Daggers will trigger this item's affect more than once.