Needs review
Source: Quintessential Elf 2

Description: You know the Charms to destroy magic.

Prerequisites: Able to cast Dispel Magic

Required for: Unbinder's Blessing

When you cast Dispel Magic or Greater Dispel Magic to either counterspell or dispel an active spell you may sacrifice a second arcane spell of any level. You may increase your effective level for the purpose of the dispel check by the level of the spell sacrificed. 0 level spells may not be sacrificed for this effect.