Swan Song

You build up and detonate the divine spark inside of you, causing it to explode viciously. Hostile creatures within a 120 foot range emitting from you make a dexterity saving throw. On a failure they take your character level times twenty radiant damage. Allies within that same radius heal for an amount equal to twenty times your character level.  Casting this spell causes the user to die, and this effect cannot be stopped by death preventing spell such as Death Ward. In addition this spell damages the soul of the caster, preventing them from being resurrected (outside of the wish spell).