First, theres the undisputed king, Black Lotus
If your strategy is to stack and attach as many Energy Cards to your Attacker and Strike a multiplier move to your opponent, choose Trainer cards that can derive Energy Cards from the deck and discard pile
There are multiple cards that care about the number of creatures you control such as Riona Heartilly and Snow Villiers to encourage you to go into Selesnya if you get them in your pool
Delirium If there are four or more card types among cards in your graveyard, search that player's graveyard, hand, and library for any number of cards with the same name as the exiled card, exile those cards, then that player shuffles his or her library
I used some 18mm thick plastazote foam, but EVA foam will do just as well
Master Hyperion X LIGHT Level 8 [ Fairy / Effect ] ATK 2700 DEF 2100 You can Special Summon this card (from your hand) by banishing 1 "The Agent" monster from your hand, field, or GY