mystery cards mtg Booster / The List Rare Dolmen Gate #256 exile target instant or sorcery card from that graveyard Current list of Mystery Booster

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

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

For ramp I actually would avoid most of the traditional mana rocks outside of Sol Ring, Arcane Signet, Fellwar Stone

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

Search your library for up to two creature cards with different names, reveal them, put them into your hand, then shuffle