You create a long tendril of fire which lashes out at your command toward a creature in range. Make a melee spell attack against the target. If the attack hits, the creature takes 1d6 fire damage and if the creature is no more than 1 size larger than you then it cannot move further away from you until the start of your next turn. The spell ends if the target is ever outside the spell’s range or if it has total cover from you.

The spell's damage increases by 1d6 when you reach 5th level (2d6), 11th level (3d6), and 17th level (4d6).