Whenever Rex, Cyber-Hound deals combat damage to a player, they mill two cards and you get {E}{E} (two energy counters). Pay {E}{E}: Choose target creature card in a graveyard. Exile it with a brain counter on it. Activate only as a sorcery. Rex has all activated abilities of all cards in exile with brain counters on them.
![Rex, Cyber-Hound (Extended Art) (Surge Foil) [Fallout]](http://tothetablebgc.myshopify.com/cdn/shop/files/539a969b-18ae-4958-b4bc-32b2ac3d4295_3c4176f1-f57a-4b1b-aae1-5c41f285f82b.png?v=1776620868&width=1445)
