Arcane Muscle

Your muscles swell with arcane power. They’re too clumsy to effectively wield weapons but certainly strong enough for a powerful punch. Until the spell ends, you can choose to use your spellcasting ability modifier for Athletics checks, attack and damage rolls of unarmed strikes. Your unarmed strikes deal an additional 1d8 bludgeoning damage and count as magical for the purpose of overcoming resistance and immunity to nonmagical attacks.

Cantrip Upgrade: This spell allows you to make additional unarmed strikes at level 5, two additional unarmed strikes at level 11, and three additional unarmed strikes at level 17.