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
I also like this with two Commanders with partner, if they are mixing it up in the red zone with the attacks
The deck theme provides you with information, such as which cards you want to play, the most efficient spells for each theme, how you win, and sometimes how you avoid losing
They are also much more convenient to lay as a land drop later in the game than shock lands
There are way too many bombs in the Multiverse Legends sheet
and along with other two-for-one cards like Force of Vigor, they are some of the most powerful cards in the game: they offer instant-speed interaction for no mana