The new Elemental Evil spell immolation specifies:
If damage from this spell reduces a target to 0 hit points, the target is turned to ash.
Does this mean the victim gets no death saves and cannot be healed? I don't think even revivify or raise dead would work on the victim, since those spells do not "restore missing body parts".
Does it seem unbalanced for a 5th-level spell to bypass the normal sequence of events that can forestall death for a character brought down to 0 hp, and jump one straight from hitting 0 hp to requiring (at least) a resurrection spell? (Based on comparison with disintegrate, they probably require a true resurrection.)
This is consistent with the disintegration effect of the 6th level disintegrate spell (and the description of that spell states that a true resurrection is required to restore the creature to life), but at least the victim can save to avoid all damage in that case.