mtg march of the machines serialized cards Jin-Gitaxias // Great Synthesis the Machine Collectors | Magic March Of The Machine Praetors

(Whenever you cast an instant or sorcery spell, copy it for each spell cast before it this turn

Its more versatile for Cubes and 1v1 Constructed formats, but EDH players might resort to the originals due to color identity restrictions

Adventures in the Forgotten Realms Set Boosters contain: At least 1 rare or mythic rare card (approximately 27% of Set Boosters contain 2 rares or mythic rares, 3% contain 3, and it's even possible to open 4 though that's less than 1% of the time.) 1 Traditional foil card of any rarity 1 Rulebook, module, or borderless common or uncommoncheck out the Collecting Adventures in the Forgotten Realms article for details

You can cash one of these in to craft a card of the matching rarity

You may play Desert lands from your graveyard

Oathsworn Knight is also another potential three-drop for more aggressive styles of Mono-Black Devotion it has two black mana symbols and the fact that you have Gray Merchants in your deck means they cant just take the damage forever