Aura of Dust

An Aura of Dust surrounds the caster in a dust field charged with necrotic energy particles. This aura will function upon the killing of an undead foe, granting one round of aura protection per hit dice of the undead killed - to a maximum of 13 rounds. The caster has resistance to necrotic damage, and its hit point maximum can’t be reduced. In addition, any attack that would kill the caster outright will instead leave the caster at 1 hit point. The caster also regains 1 hit point when it starts its turn in the aura with 0 hit points.

Please Note: The aura will linger for its duration of even if the caster is rendered unconscious or dead, the aura slowly covering the caster if laying on the ground non-moving.