mystery cards mtg Booster / The List Rare Dolmen Gate #256 for each graveyard with an instant or sorcery card in it Mystery Booster" Playtest Cards Rise

Once you start sacrificing those tokens, or if you have an engine to keep sacrificing, you can start milling your opponent two cards anytime you sacrifice something at level 2

It would be best if your follow-up plays involve flooding the board with haste.

Converting into Blaster, Morale Booster from Blaster, Combat DJ does not cause it to get counters from its modular ability

Often you want to use your Fetchlands to fetch a tapped shockland when you dont need to use the mana, fetch basics early to play around Blood Moon, or crack a fetchland simply to thin your deck/re-arrange your library to increase your chances of drawing a nonland spell

For that, there are a few cards that are obvious inclusions, and a few that might be surprising