post son of rich mtg card K'rrik, Yawgmoth put a +1/+1 counter on Krrik Post Malone Secret Lair &

They were simply a home for reprints to increase the availability of particular cards and to determine what was legal in Standard (which was known as Type 2 way back when)

As far as R&D is concerned, common white has twelve slots

Casting this on turn 2 will drop a four-mana Commander on turn 3, although most Commander players would prefer that to be Rampant Growth

In theory, we could play cards like Uro, Titan of Nature's Wrath just because they're powerful and in our colors, but this doesn't really work with the kicker theme of the deck

There are some very valuable uncommons in Magic, but we can be a little less careful here (Wasteland, Aether Vials, et al