Feverskin

5th-level biomancy*

Casting Time: 1 action
Range: Self
Components: V, S, M (a red hot chilli pepper, which the spell consumes)
Duration: Concentration, up to 1 minute
Class: Cleric, Druid, Sorcerer, Tamer, Warlock, Wizard

You eat a chilli pepper, your metabolism increases, and your skin begins to burn to the touch. Make a melee spell attack against a creature within your reach. On a hit, the target takes 6d6 fire damage. Until the spell ends, you can use an action on each of your subsequent turns to make this attack again.

For the duration, your walking speed increases by 15 feet, and you gain 2d6 temporary hit points at the start of each of your turns.

At Higher Levels. When you cast this spell using a spell slot of 6th level or higher, the damage increases by 1d6 for each slot level above 5th.

*can be replaced with evocation
Source: Heliana's Guide to Monster Hunting