I think this set will have an impact on Magic, more specifically on the Historic format
From a small sample, Lightning and Psychic Energy appeared the most often (in Gym Heroes it was Lightning Energy, Gym Challenge I did not look at)
V-Flame 40 Weakness +20 Retreat
In the decks that play it Mox Opal is almost better than Mox Sapphire, and while it does bring with it deck-building constraints but the payoff is just so high
Kaust, Eyes of the Glade is the lead commander, though it seems like a step down from Commander 2019 s Kadena, Slinking Sorcerer, which has been and will probably continue to be the go-to morph/disguise commander
It was the best equalizer that ever existed in Magic