The answers to these will help guide you more
We've had spell-copying effects and creatures in Standard for a few cycles now, and none of them have been top tier
However, there are some cards in Portal: Three Kingdoms that the community has largely overlooked
Mana Flare, Miraris Wake and Heartbeat of Spring (with Turnabout, Candelabra, and Rude Awakening) are also a great way to set up the actual Dragonstorm card in my deck
Ramp shells, Tron builds, and Commander decks built around big-mana engines all benefit from having a reset button that sticks around afterward
Like the Magic: The Gathering and Fortnite crossover, Unfinity is a strange set with more questions than answers at the moment