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://www.cardmerchanttakapuna.co.nz/cdn/shop/files/de2920a2-c3cb-549b-ba10-2764acd1426a.png?v=1770145331&width=1445)