Arcane Rune

The Arcane Rune is a boss summoning item that summons the Arcane Shadow. When used, a giant rune will appear above you glowing white and a few seconds later the Arcane Shadow spawns.

How to craft:

 * 50 Arcane Rune walls
 * 30 Shadow Fragments
 * 100 Shadow Stone

Crafted at:
Shadow Forge