Less valuable, but not less powerful, is Ghalta and Mavren, a seven-mana dinosaur vampire that boasts an impressive stat line: 12/12 Trample WITH significant upside when it attacks
Edge of Eternities Commander (EOC), Stellar Sights (EOS), and Special Guests (SPG) are Commander-, Legacy-, and Vintage-legal sets, and individual cards are also legal where already available in other formats
Foils are almost certainly a hold if you have any as RL foils are that much more rare and will not cycle back into the market as often as the non-foil versions due to their collectibility
This is just a handful of the ridiculous things you can do with the new Final Fantasy cards
Either way, though, its a lot of fun
I see Sinkhole Surveyor as a beater that can get out of cheap removal range fast, and with some Bloomburrow bats around, the life loss is somewhat relevant