I immediately dove into spoilers and put together a list of what I think the best Control cards from MKM are
There is a penalty for revealing a slate token, but it is not that heavy since you only lose the charge unless you have no charges left
Jumbo Pokemon cards have been a part of many Pokemon TCG set events since the 2000s, and The Pokemon Company still prints new copies of it in the Scarlet and Violet era
As one of most popular Dimir commander, both in general and cEDH, players expect Yuffie / Yuriko to go straight to Brawl's hell queue on day 1, as she'll very likely be one of the best commanders in that format, too
The 'Y' Mega Evolution is the version that stays true to the original design, enhancing its special attack and flying capabilities rather than changing its type to Dragon (like Mega X)
Using extra ink to move your characters to Motunui before sacrificing them in a challenge is also a great strategy, since every one of your characters that's banished there will move to your inkwell instead of your discard pile