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Rotting Doom
Wizard Attack 1

You hold up your hand, palm out, and release pale wisps to infect your foes with horrid decay.

Target: One creature

Hit: 1d8 + Intelligence modifier necrotic damage. If the target is undead, it also gains vulnerable 5 to all damage until the start of your next turn.

Level 21: 2d8 + Intelligence modifier necrotic damage.

Effect: The target cannot regain hit points until the end of your next turn.

The Rotting Doom spell weakens a creature's structural bindings, causing them to breakdown until their flesh sloughs away. Creatures killed by this spell are reduced to quivering, jellied masses.[HoS:99]