2 Emet-Selch, Unsundered/Hades, Sorcerer Of Eld From FFXIV Fill Your Graveyard, Then Use It As Your Second Hand Though Emet-Selch won't completely eradicate the board like a Rejoining eradicates a world, he can be dangerous if allowed to go unchecked for long enough
Pir, Imaginative Rascal // Toothy, Imaginary Friend Together, Pir and Toothy can lead a fun Counter deck, likely +1/+1 Counter with various other Counter themes
And you wont have to put down a lot of your own green to acquire these cards
There are new dual lands, as well, and these ones seem pretty powerful, entering untapped and tapping for colored mana as long as they just entered or you have at least one basic land
Mystic Sanctuary: great fetchable utility land, can set us up with an extra turn with Walk the Aeons or even infinite turns with Venser, Shaper Savant in conjunction with the afromentioned extra turn spell
Think of it as catnip