Ursula's Army The sea witch will use all her powers to protect her lair against the Illumineers
For science fiction, we made sure the set had robots and aliens and spaceships and technology
I think you could argue Storm is a white character: She's a leader, she's noble
Plumecreed Escort Nice piece of interaction for Mutate decks, or flicker decks that tend to enjoy flyers
Also, there are Transformers, representing this sets showing of MTGs Universes Beyond pop-culture crossovers
At time of writing, there are only two known commons that reward this unnamed mechanic: Arena Trickster, which turns from an unexciting Hill Giant into a Rampaging Baloth (and can continue to grow), and Naiad of Hidden Coves, which allows you to play two Vexing Gulls on turn four