Amethyst vs Amethyst matchups typically involve complex sequences of playing Genie - Wish Fulfilled, Elsa - The Fifth Spirit, Belle, and now the new Dumbo - Ninth Wonder of the Universe
At any multiplayer table, someone is rocking almost all non-basics, either intentionally with a light basic land mana base or accidentally, based on what they drew that game
Finally, in Big Mana or control strategies, it acts as a resilient mana source in the early game and becomes a powerful, inevitable win condition that you can sink your excess mana into
Attacking into a Psychatog means losing whatever creature the opponent decides to block
It does cost two Blue mana which can be a little tricky in multicolored Commander decks to cast, but the reward is so high
mechanics, Ruby is great at banishing cards from the table