all hydra cards mtg The Best Hydras in Magic block) open.class Polukranos Reborn HYDRA Commander Deck

The only issue, assuming you don't consider costing ten mana an issue, is that resolving four cascades in a row can get complicated, especially when individual cascades hit other cascade spells mid-resolution

If theres a Mesmeric Orb on the table, your gameplan is accelerating as they take game actions, but its also scaling based on the players that are trying to win with their own gameplan

Do I want one of these cards

Pocahontas, Peacekeeper Iconic, 241/204 As we reach the top of the list, we find the two Iconic cards from Winterspell

Its a great blink target, and later in the game, you can transform it into Kefka, Ruler of Ruin, a strong flier that can draw you so many cards just by attacking and dealing damage