Prime Speaker Vannifar {2}{G}{U}
Legendary Creature — Elf Ooze Wizard
{T}, Sacrifice another creature: Search your library for a creature card with mana value equal to 1 plus the sacrificed creature's mana value, put that card onto the battlefield, then shuffle. Activate only as a sorcery.
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Cards that do something similar expected a card that isn't here?
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Illuminor Szeras 83%
$6.73#5226
"{T}, Sacrifice another creature: Add an amount of {B} equal to the sacrificed creature's mana value."