The most expensive Prismatic Evolutions cards are the Eeveelution Special Illustration Rares
Even though the original transformation mechanic wasnt exactly the same as the new daybound/nightbound mechanic, its the foundation on which it was built
Working a Hunch provides further speed to the deck by granting test-less clues, and since Solo campaigns usually only have 1 clue per location, this means that you can just walk 1 location with Ursula (action 1), play Working a Hunch to get the clue there without using an action, then use Pathfinder to move to another location, use Fieldwork to buff your investigation value to 6 (or 7 with Magnifying Glass), then use Ursula's ability to gather another clue at this location, and you now still have 2 actions left after having cleared 2 locations on the board, which you can use to play a Blood-Rite or to further move around on the board
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you may have other attacking creatures get +X/+X until end of turn, where X is Cultivator of Blades's power is the effect
Yidris, Maelstrom Wielder Yidris, Maelstrom Wielder stood among the first official 4-color commanders in the format and boasts a powerful ability