Red will be able to use spells that deal damage to destroy things, and Green is stuff with cards that let your creatures fight other creatures
I really like the action star mechanic for a couple of reasons: first, because it makes you carefully choose what to spend your 5 stars on, and second, because it means the game won't be automatically dominated by the rich kid who can just buy all the best action cards
Cyclonic Rift will simply win games
Let me know what cards you would play in Sethron
#2 Sphinx of the Revelation Coming in at number two, we have a truly unbelievable card advantage engine for Energy decks
In limited, you have enough Lander tokens floating around to repeatedly double somethings' power, but in constructed and Commander, this slots nicely into the endless parade of fetchlands, extra lands, and land recursion that already make land decks an absolute beast to play against