Improved Swift Banishment
Level 18 Cleric

Prerequisites: Swift Banishment

You easily banish creatures with your weapon. You can use Swift Banishment as long as you have a spell slot of 5th level or higher remaining, even if you don’t have banishment prepared. You must sacrifice a prepared spell of 5th level or higher, and the banishment effect you create is heightened to the level of that spell. Your weapon serves as the special material component of banishment, causing the target to take the –2 penalty to its save against any banishment you cast using Swift Banishment.