Adamantine Skin

Until the spell ends, a coating of adamantine spreads over your skin, and you gain the following benefits:

• You have immunity to bludgeoning, piercing, and slashing damage from nonmagical attacks. You also have immunity to critical strikes.

• You gain disadvantage on saving throws from lightning attacks and spells and vulnerability to that damage.

• As an action you can make a melee spell attack against a creature within your reach. The target takes 2d12 + plus your spellcasting modifier magical bludgeoning damage.