Many colors also have cards that reward you for having lots of permanents or basic lands in one color
MODERN HORIZONS 3: LANDS & MDFCS Modern Horizons 3 has a whole host of lands, including two land cycles, fetchland reprints, and loads of MDFC cards
Each one recurs themselves with an activated ability that costs two mana
though very straightforward and less powerful than, say, Professors Research, which allows you to discard your hand and draw 7 cards, its that first turn caveat which makes Carmine so appealing
My Pinsir problem aside, there's a way to pick up individual cards through the shop via a pack points mechanic, but you get five points for every pack you open, and rare cards like Mewtwo ex and Pikachu ex cost 500 points