A card for Cecil from Final Fantasy IV allows him to transform from Dark Knight to Paladin as he does in the game, with borderless full-art versions for diehard collectors to hunt for
tokens isnt bad either
Thrasios, Triton Hero often chills in the command zone until you have infinite mana to feed into its activated ability so you can draw your deck and win with Thassa's Oracle, but you can also exploit the activated ability with cards like Training Grounds and Seedborn Muse
Cards have specific effects when played from a players hand or inked into their well to cast more powerful cards, as does Questing for the TCGs winning resource
8 Pooh Pirate Ship 32/204, Item, Amber Disney Lorcana: Azurite Sea has numerous pirate cards, many of which are Amber ink versions of characters in the Winnie the Pooh universe and will make for a really fun themed deck
Players have already come up with methods of summoning 10,000 tokens, playing every Land card in your deck, and instantly defeating every other player at the Commander table