Stone Aegis

1st-level · Transmutation

Casting Time 1 reaction, which you take when you are hit by an attack

Range Self

Components V, S

Duration Up to 1 minute

Classes Cleric, Druid, Warlock

A rocky coating covers your body, protecting you. Until the start of your next turn, you gain 5 temporary hit points and a +2 bonus to Armor Class, including against the triggering attack.

At the start of each of your subsequent turns, you can use a bonus action to extend the duration of the AC bonus until the start of your following turn, for up to 1 minute.

Source: Tome of Heroes · OGL/Open