1st-level Abjuration

Casting Time: 1 bonus action

Range: Self

Components: V, S, M (a shard of blue glass)

Duration: 1 hour

Protective magical frost surrounds you. You gain 5 Temporary Hit Points. If a creature hits you with a melee attack roll before the spell ends, 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 spell slot level above 1.