Blaze's Shield of Flame

A flaming shield is summoned like a bubble around your friend scorching their attacker. The attacker must make a DEX save or take 1d10 fire damage. On a successful save they take half damage. The shield remains until the person it was cast upon moves.

At Higher Levels. When you cast this spell using a spell slot of 4th level or higher, the damage increases by 1d10 for each slot level above 3rd.