7 cards where the card is tagged “form”

Abian, Luvion Usurper (Mystery Booster Playtest Cards 2021 #87)
Form of the Approach of the Second Sun (Unfinity #9)
Form of the Dinosaur (Rivals of Ixalan #103)
Form of the Dragon (Ninth Edition #187)
Form of the Mulldrifter (Mystery Booster Playtest Cards 2021 #22)
Form of the Squirrel (Unhinged #96)
Garruk the Slayer (M15 Prerelease Challenge #1)

The message was clear to Sorin—time to search for something else.