Battle Caster's Strike TGG

Battle Caster's Strike 

Brandish a weapon. Make a melee spell attack using your spellcasting ability for the attack and damage rolls. The target takes the weapon's normal damage plus 1d8 Force damage.

On a hit, you can expend 2 sorcery points and the target becomes wrapped in an arcane nimbus until the beginning of your next turn. If the creature moves willingly before then they the take 2d8 Force damage, and the spell ends.

Cantrip Upgrade. The attack deals extra Force damage when you reach levels 12 (2d8), and 16 (3d8).