Grimlore's Grimoire

Apocalypse

6-level Conjuration

You cause demonic symbols to appear beneath the feet of every creature you choose within range. Each creature must make a Dexterity saving throw or take 3d8 fire damage and become stunned until the end of its next turn. A creature takes half damage and is not stunned on a successful one. Creatures gain no benefit from cover for this save
At higher levels: When you cast this spell using a spell slot of 7th level or higher, the damage increases by 1d8 for each slot level above 6th.