pokemon card mewtwo mega ex M (160/162) [XY: BREAKthrough] Lightly Played Holofoil Psychic Colorless Mega Mewtwo EX Vanishing Strike

If a card has an effect that specifically removes counters such as Vampire Hexmage, Glissa Sunslayer, or even the newest card, Render Inert, that could also fulfill the transform requirement

The next set, M21 (2020) had another Chandra

Janine's Secret Art is one of the latter group, but Crobat is a powerful card that allows it to have some of the advantages of the former group

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Impeccable Timing is a White Instant with a casting cost of one generic and one White mana that deals three damage to target attacking or blocking Creature

Purple Law and Black Yellow Luffy, but falls behind against the Black Gecko Moria and Rob Lucci.