Armor of Agathys

Level: {x}th Casting Time: 1 Action
Range/Area: Self Components: V, S, M *
Duration: 1 Hour School: Abjuration
Attack/Save: None Damage/Effect: Cold
* - (a cup of water)
A protective magical force surrounds you,
manifesting as a spectral frost that covers you and
your gear. You gain 5{x} temporary hit points for
the duration. If a creature hits you with a melee
attack while you have these hit points,
the creature takes 5{x} cold