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This is weird perhaps the most obvious use for the Transform keyword would be cards based on the Autobots and Decepticons from the Transformers universe, right

Kess, Dissidant Mage Kess, Dissident Mage is a fine Spellslinger general, able to turn your graveyard into an extension of your hand, choosing the best instant/sorcery for the situation

#9 Mega Absol ex 180/132Market

Cards similar to Clever Concealment include Appeal to Eirdu, Conclave Phalanx, Disruptor of Currents

When Enduring Tenacity dies, if it was a creature, return it to the battlefield under its owner's control

That doesn't mean I think it's bad or that you're bad for playing them, and, to be clear, this is for casual EDH only