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
Sets that primarily take place there : Throne of Eldraine and Wilds of Eldraine (coming later this year) Planeswalker natives (with planeswalker cards) : Rowan and Will Eldraine was inspired by Camelot and fairy tales
0093_MTGMB2_WhiteRep: Uro, Titan of Nature's Wrath 0115_MTGMB2_WhiteRep: Wasteland 0058_MTGMB2_WhiteRep: Goblin Guide The change in border does not alter the legality of these cards, and they are legal for play wherever their black-bordered counterparts are
Angelic Purge lets us sacrifice Demonic Pact as part of its cost, getting past counterspells
Graft 1 (This land enters with a +1/+1 counter on it
Cymede gets a pretty fantastic story as well