Magic s lead designer has confirmed on his personal blog that multiplayer is on the development roadmap for Arena
Yorion, Sky Nomad was a Companion banned out of Modern just this month
Plus, this version can't be countered, so you can safely play it into a blue control deck
We have a multitude of effects that increase our creatures' power and toughness, increasing our deck's aggressiveness, such as Chief of the FoundryChief of the Foundry, Steel OverseerSteel Overseer, and the above mentioned Master of EtheriumMaster of Etherium, each helping to sculpt the ideal environment for the Urza Constructs to frolic and cause mayhem
Thats the key difference between mythics and lower rarities
Its a serious format, with an interlocking puzzle of interactions and combos that I couldnt begin to unpack quickly