Demonic heat

Demonic Heat

4th level Evocation
Casting Time: 1 action
Range: Self (30-foot-radius sphere)
Target: Self (30-foot-radius sphere)
Components: V S
Duration: Concentration, Up to 1 minute
Element: Fire
Air gets hot like in hell. A large grinning demonic face made of the heated air forms in the sky. When a creature, except yourself, enters the spell's area for the first time on a turn or starts its turn there, it must make a Constitution saving throw. It takes 1d6 fire damage on a failed save, or half as much damage on a successful one. The spell ignites easily ignitable objects (paper, hay, dry wood...) and heats metal ones (weapons, armor...). Any creature in physical contact with the heated metal object takes additional 1d8 fire damage when you cast the spell, and continue to take the damage when ever it take the base damage from this spell. If a creature is holding or wearing the object and takes the damage from it, the creature must succeed on a Constitution saving throw or drop the object if it can. If it doesn’t drop the object, it has disadvantage on attack rolls and ability checks until the start of your next turn.
At Higher Levels: When you cast this spell using a spell slot of 5th level or higher, the damage increases by 1d8 for each slot above 4th.