mtg commander hydra deck EDH Deck Atraxa, Grand Unifier 100 Magic Cards – Moonveil Games Trample Kalonian Hydra enters the battlefield with four +1/+1 counters on it Mossborn Hydra - Foundations -

Those two cards combined led to the creation of a wide array of green-black decks that Sol Malka got named "Rock." Eventually that name was corrupted to include any green-black deck involving creatures but the creatures were never the key to Rock's success

It boosts your entire board based on your speed, and if that werent enough, this Naya commander also gives your noncreature spells cost reduction for each point of speed you gain

1 Thrill of Possibility

You don't have to reveal the cards in the face-down pile, no matter which zone they're put into

The disadvantages are that you effectively lose a character you already paid for