The first is some kind of impossibly try-hard Omnath, Locus of Creation plus General Ferrous Rokiric brew in Modern, which sounds unplayable to me right now
At the beginning of your end step, if you sacrificed a Food this turn, you may search your library for a basic land card, put that card onto the battlefield tapped, then shuffle
However you do it you have to have a good plan going on, which piques my interest
A new Ixalan will be in Standard eventually, too, which means we may have some more merfolk coming to back this one up before you know it
In a multiplayer format like Commander, this can provide four tokens for its controller per turn rotation
Dinosaurs Creatures (25) 4 Llanowar Elves 1 Rhonas the Indomitable 3 Carnage Tyrant 4 Regisaur Alpha 4 Drover of the Mighty 1 Ghalta, Primal Hunger 4 Steel Leaf Champion 4 Gigantosaurus Lands (24) Spells (11) Sideboard This is the kind of tribal deck WotC seems to like: a bunch of good rate rares and mythics with one or two small tribal synergies