Dusken's Inner Soul Explosion

You draw in magical energies around you, becoming resistant to damage until the start of your next turn. If you are melee attacked during this duration, the attacker has to pass a DC18 STR check, or be knocked back 10 feet by the energies and take 1d8 bludgeoning damage. You have +5 AC against ranged missiles in this period as well.

At the start of your next turn, the energies cause your soul to explode, dealing 10d8 necrotic damage to targets within 15 feet of you and half that to targets further away but within 40 feet of you. The damage applies to yourself as well. The damage only hits those within sight from the caster.

If the damage kills you, a fragment of your soul will anchor in your soul vessel. You will remain conscious in there, but will not be able to leave it without assistance. Your body will be obliterated.

If the vessel is destroyed, your soul is lost unless there is a suitable nearby anchor.