mtg commander horror deck / EDH decks — spanning entity that thrives on the fear of its inhabitants Duskmourn: House of Horror Commander

It revolves around control -- card advantage and tempo advantage -- and Serra Angel played the double duty of offense and defense each turn

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Thus, you will be getting some Chandra hate

I recently cheesed a mate of mine who was running a burn deck by playing a Sejiri Steppe as one of my lands and it won me a game

As if that wasnt enough, attacking with Sephiroth lets you sacrifice a bunch of creatures to draw cards

Probably less useful in Commander than in other formats, but still worth consideration, especially if your local environment uses more targeted removal than mass