Armor of Agathys 2024

A protective magical force surrounds you, manifesting as a spectral frost that covers you and your gear. You gain 5 Temporary Hit Points for the duration. If a creature hits you with a melee attack , the creature takes 5 Cold Damage. The spell ends early if you have no Temporary Hit Points.

Using a Higher Level Spell Slot. The Temporary Hit Points and the Cold Damage both increase by 5 for each slot level above 1.