You can also demonstrate identity through gameplay, or how you play
Obviously its not really worth spending two mana and a card to turn your worst creature into the best creature on the battlefield, but what about a spell that can either do that or turn your opponents best creature into the worst creature on the battlefield
While fighting with [Apollomon] and [Dianamon], DNA Digivolve to [BT25-103 GraceNovamon] using their effects to suppress your opponent's Digimon all at once
As long as one target remains legal, any legal targets won't be able to block this turn, any illegal targets won't be affected, and you'll discover 4
The commander looks scary, but he truly just exists as a guaranteed source for discarding your hand, because you can't win the game with the deck's final ability unless you're all in, and he helpfully fills the graveyard for a creature to target when you roll a natural twenty with the deck
If you manage to trigger this planeswalker's -9 loyalty ability, you can automatically give a player nine poison counters