Ashes' Hellfire Whip

You create a whip made of devilish flame and select one creature within range.

The target must make a Dexterity saving throw. On a failed save, the target takes 3d8 fire damage and you may choose to attempt to knock it prone or disarm it. On a successful save the creature only takes half damage and the spell has no other effects.

If you choose to knock it prone or disarm it, the creature must make a Strength ability check against an ability check using your spellcasting modifier. If the creature fails, you take possession of the item or knock the creature prone. 

At Higher Levels. When you cast this spell using a spell slot of 3rd level or higher, the damage increases by 1d8 and the range increases by 15 feet per spell level above 2nd.