Fist of Iron

Level: Cantrip Transmutation
Classes: Cleric, Sorcerer, Warlock, Wizard
Casting Time: 1 action
Range: Self
Components: V, S
Duration: Concentration, up to 1 minute
Source: Deep Magic 5e

You transform your naked hand into iron. Your unarmed attacks deal 1d6 bludgeoning damage and are considered magical.