Blazing Divide

You summon primordial flame to your fingertips and slice the air in front of you at an enemy you can see within range. The creature must make a Dexterity saving throw as bright flame erupts from beneath them in a 5ft by 5ft line, threatening to envelop them in fire. On a failure, the enemy takes 8d8 Fire damage that cuts through all resistances and immunities. On success they take only half the damage.