Weve known about the Floodborn since the first set, but now we can reveal what caused the flood that created them
Starting with the most aggressive ones, we use Terror of the Peaks as a possible win condition to deal damage to opponents, Xenagos, God of Revels, Etali, Primal Storm, Etali, Primal Conqueror (it's worth noting that its transformed version, Etali, Primal Sickness, is a way to possibly defeat an opponent), Gisela, Blade of Goldnight serves both as an aggressive resource and a defensive one, and Ghalta and Mavren, to create more creatures each time and deal even more damage
You also get useful staples and easy upgrades in the same shell, so it teaches core Commander fundamentals while still feeling powerful out of the box
This ability doubles your army with each activation, allowing you to go from a handful of Goblins to hundreds in a single turn
Not all cards in the deck are redesigned, but those that are have become hugely valuable, and thus a popular target for proxies.