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 (Surge Foil) [Fallout]](http://tothetablebgc.myshopify.com/cdn/shop/files/7e56e5a9-e1de-4879-9287-37d1c16d46dd.png?v=1776531299&width=1445)
