black belt training pokemon card Belt's - Pokemon: Ascended Heroes - 255/217 - Holo Black Belts Training Supporter Black Belt's Training (Common/Reverse Holofoil)

The concept is pretty simple, you break the symmetry of the sacrifice effects and either lock your opponent out of the game or just pull very far ahead

13 Gandalf The White Gandalf's poster art is

Nightbound (If a player casts at least two spells during their own turn, it becomes day next turn.) Illustrated by Chris Rallis Standard Not Legal Alchemy Not Legal Pioneer Legal Historic Legal Modern Legal Brawl Legal Legacy Legal Comp

Apart from mutate cards to trigger that ability, I guess you could use Stuffy Doll and Brash Taunter, or fill your deck with cards that grant abilities to your commander like backgrounds and the legendary familiars (Kediss, Falthis, et al)

Without resorting to proxies, making changes to an IRL Pokemon TCG deck could cost you a fair few quid - depending on which cards youre trialing obviously - but here, its all free