As an additional cost to cast this spell, sacrifice a creature.
Search your library for a creature card with mana value X or less, where X is 2 plus the sacrificed creature's mana value. Put that card onto the battlefield, then shuffle. Exile Eldritch Evolution.
![Eldritch Evolution (Borderless) [Secret Lair Showdown]](http://tothetablebgc.myshopify.com/cdn/shop/files/f743b688-25e8-421e-97b5-d294dda34817.png?v=1776428592&width=1445)
