MANAHIVE

“Tainted Aether” is unique, but here are similar black enchantments:

• “Grave Pact” — Whenever a creature you control dies, other players sacrifice creatures.
• “Dictate of Erebos” — Same effect as “Grave Pact,” but with flash.
• “Attrition” — Not an enchantment but lets you sacrifice a creature to destroy one.
• “Teysa, Orzhov Scion” — Creature with a similar sacrifice effect.
• “Tainted Aether” — The card you searched for.

Reason: All listed are black, enforce sacrifice, and are enchantments unless noted. “Tainted Aether” itself is the closest.