Accelerant

You accelerate the rate at which fire spreads within a 60ft radius around you. Any fire in that area doubles in size and intensity while you concentrate on this spell and any creature that took fire damage within the last round of combat reignites in flames for the duration of the spell. At the start of a creauture's turn they take 2d8 fire damage until they suceed on a dexterity saving throw at the end of one of their turns to end the effect. Once a creature saves from this spell it cannot be affected again until the end of a long rest.