Now I don't really know anything about Pokemon
Here's a short list of potentially playable cards that allow you to discard aftermath cards for value: As you can see, while red, black, and blue have the most discard outlets, in theory, you can make a discard theme work in just about any color thanks to colorless options like Key to the City and Geier Reach Sanitarium

Spawnsire of ulamog Creature (30) 1x Arachnoid 1x Burnished Hart 1x Cathodion 1x Clockwork Dragon 1x Conduit of Ruin 1x Dancing Scimitar 1x Darksteel Gargoyle 1x Eldrazi Mimic 1x Endbringer 1x Endless One 1x Gold-Forged Sentinel 1x Hand of Emrakul 1x Hedron Crawler 1x Kozilek's Channeler 1x Manakin 1x Manor Gargoyle 1x Matter Reshaper 1x Myr Battlesphere 1x Oblivion Sower 1x Palladium Myr 1x Pilgrim's Eye 1x Plague Myr 1x Scion of Ugin 1x Stuffy Doll 1x Teeka's Dragon 1x Tetravus 1x Thopter Assembly 1x Thopter Squadron 1x Walking Atlas 1x Warden of Geometries Land (37) 1x Crystal Vein 1x Glimmerpost 1x Mage-Ring Network 1x Radiant Fountain 1x Rogue's Passage 1x Sanctum of Ugin 1x Sea Gate Wreckage 1x Seraph Sanctuary 1x Shrine of the Forsaken Gods 1x Spawning Bed 1x Temple of the False God 1x Terrain Generator 1x Tomb of the Spirit Dragon 23x Wastes 1x Zoetic Cavern Artifact (29) 1x Akroma's Memorial 1x Ashnod's Altar 1x Basalt Monolith 1x Blinkmoth Urn 1x Dreamstone Hedron 1x Elixir of Immortality 1x Everflowing Chalice 1x Genesis Chamber 1x Hedron Archive 1x Hedron Matrix 1x Helm of Awakening 1x Journeyer's Kite 1x Magnifying Glass 1x Mind Stone 1x Mirrorworks 1x Myr Incubator 1x Myr Turbine 1x Prismatic Lens 1x Pristine Talisman 1x Seer's Lantern 1x Sisay's Ring 1x Sol Ring 1x Sword of the Animist 1x Tamiyo's Journal 1x Thought Vessel 1x Ur-Golem's Eye 1x Voltaic Key 1x Warden of the Wall 1x Worn Powerstone

Starting with generation 6, I have reason to believe the sequence length changed to 360 (10 booster boxes)
This used to be the king of midrange, but power creep has caught up to it
cards considered holo or reverse holo or what