When Chthonian Nightmare enters the battlefield, you get EEE.
Pay X E, Sacrifice a creature, Return Cthonian Nightmare to its owner's hand: Return target creature card with mana value X from your graveyard to the battlefield. Activate only as a sorcery.
![Chthonian Nightmare (Borderless) [Modern Horizons 3]](http://tothetablebgc.myshopify.com/cdn/shop/files/6bb26867-8b4d-4535-98d4-829d702197a4.png?v=1776475083&width=1445)
