Void

Upon reaching out to block the incoming fire bolt, upon a twist of the wrist and the muttering of some arcane words, a small dark vortex appears in the mage's palm absorbing the impact of the bolt, remnants of the strike empowering the small gnome with dark energy.

When you are other targeted by either an attack or if you take damage from an spell requiring you to take a spell saving throw, you can use your reaction to cast the void spell that creates a shield of (2d6 + spell modifier) worth of temporary hit points to block the incoming attack. These hit points last until the end of your next round in combat .