Fire Storm
EvocationA storm made up of sheets of roaring flame appears in a location you choose within range. The area of the storm consists of up to ten 10-foot cubes, which you can arrange as you wish. Each cube must have at least one face adjacent to the face of another cube. Each creature in the area must make a dexterity saving throw. It takes 7d10 fire damage on a failed save, or half as much damage on a successful one. The fire damages objects in the area and ignites flammable objects that aren't being worn or carried. If you choose, plant life in the area is unaffected by this spell.
Spell Details
Player Guide
Position the ten 10-foot cubes to maximize enemy clustering while minimizing ally overlap—use terrain and positioning knowledge from earlier rounds. Cast this after concentrating spells end or when you've confirmed enemy positions, as the non-concentration nature lets you maintain other magical effects. Dex save typically has decent success rates, so pair with effects that reduce mobility or prevent repositioning to maximize hits on multiple turns.
Spell Combos
DM Tips
Clarify cube placement before rolling—the spell allows flexible arrangement so players may try creative positioning. Remember creatures can attempt the save after seeing the cubes but before taking damage, so don't let players adjust after results are known.