Combust

Make a melee spell attack. On a hit, the target takes 4d10 fire damage and is set aflame. The target or an adjacent creature can extinguish the flames using its action. If the fire continues to burn, the creature takes 1d10 fire damage at the end of its turn each round and can roll a Dexterity saving throw to extinguish the flames.

At Higher Levels. When you cast this spell using a spell slot of 3rd level or higher, the initial damage increases by one die for each slot level above 2nd.

Adapted from Magic of Faerûn (3e)