Earthcraft Though Earthcrafts best known for its infinite combo with Squirrel Nest, this card boasts powerful potential as an effect adjacent to Cryptolith Ritethough its infinitely more expensive thanks to the Reserved List
Fell Seal: Arbiter's Mark has the Gambler class, whose Wild Card abilities generate random effects depending on the suit of cards being played
You can, of course, go as high as you want
Frenzied Fugue: An Act of Treason for permanents is a really strong card
Valley Rally, Blooming Blast, and War Squeak show some of the cutest war criminals ever, but their names are also illustrative of Magic: The Gathering Bloomburrow as a whole
It can administer a massive beating or just stack up some clues and become a chump