There is a Saga called The Coming of Galactus that ends with you spawning a 16/16 token with flying, trample, and destroying land whenever it attacks
Due to a 2021 rules change to cascade, not only do you stop exiling cards if you exile a nonland card with lesser mana value than the spell with cascade, but the resulting spell you cast must also have lesser mana value
I dont know that the current release schedule is sustainable, but one thing Ill suggest is the consideration that maybe Magic should move away from mythic rares
Plus, it can give you some insight against an opponent who is using one of the starter decks as a base for what they bring to the table against you
Itll be at least a 5/5 in most cases, and other times it will be absolutely massive
This has a lot going for it with its swarm potential, powerful removal, and a great synergistic theme