Bargain of Hellfire

You summon dark, devilish flames to overwhelm a target within range. It must make a Dexterity saving throw. On a failed save, the creature catches fire for
the next minute, taking 4d6 fire damage and expending a spell slot of its choice. A burning creature can repeat the saving throw at the end of each of its turns, ending the effect on a success or
taking 4d6 fire damage and expending a spell slot of its choice on a failure.

Bargain. If the target succeeds the initial saving throw, you catch fire instead, taking 4d6 fire damage and expending as spell slot in the same way
it would. You may repeat the saving throw at the end of each of your turns, ending the effect on a success or taking 4d6 fire damage and expending a spell slot on a failure.