Homebrew:Invocation: Legendary Sacrifice

(OOC: This is an implementation of the Legendary Sacrifice invocation from Tasha's Crucible of Everything Else volume 2)

Prerequisite: 9th level

As a reaction when you make a saving throw, you can expend a warlock spell slot to succeed on the saving throw instead of rolling to determine an outcome. You cannot use this feature to succeed on a save you have already attempted and failed.