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Tides of Blood in Dungeons & Dragons 5e

Dark Arts Companion

Tides of Blood

3-level Necromancy

Casting Time 1 Action
Range Self (20-foot radius)
Duration 1 Round
Components V, S

You draw out your own blood as well as the blood of corpses within 20 feet of you. You may choose to spend a number of hit points, and you may also gain the hit points needed from corpses within the radius, not including those of constructs, elementals, and undead. Each corpse that had a hit point maximum greater than or equal to 5 in life gives 5 hit points towards the casting, and then cannot be used to cast this spell again. As a bonus action on your next turn, you can release the blood. Each creature within 20 feet of you must make a Dexterity saving throw. On a failed save, they take 4d6 + the number of hit points gained or spent as necrotic damage. On a successful save, they take half as much damage.
At higher levels: When you cast this spell using a spell slot of 4th level or higher, the damage increases by 1d6 for each slot level above 3rd.

Class(es): Sorcerer, Wizard

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