Nexus of Chagrin (Spell)

Nexus of Chagrin is a 5th level Essence spell that places down a 20-foot radius around a target creature, dealing 3d8 Essence at the start of each of the caster's turns for up to 1 minute. If a creature is reduced to 0 HP, it disintegrates and cannot be resurrected except by a True Ressurection or a wish.
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==Description==
You create a volatile nexus of Essence at a point you choose within range. The nexus pulses at the end of each of your turns, dealing 3d8 Essence damage to all creatures within 20 feet of it. If a creature is reduced to 0 hit points by this damage, its body disintegrates into a cloud of Essence, which cannot be restored to life except by a True Resurrection spell or a wish.