Between unwrapping presents and binging on eggnog, I had the chance to try out Unstable with some friends
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Historic cards refer to cards that are either legendary, artifacts, or Sagas
This can really turn the game around, even if it doesnt end it on the spot, and could see play in even more modern EDH decks with the right justification
However, if your mission statement as a casual player is play as many unique and enjoyable games as possible, then at least having an open mind and a 1v1-oriented deck will lead to playing games you otherwise wouldnt both in how those games play out and the actual literal opportunity to play them
Dana is one of the cohosts for the awesome EDHREC podcast and of course writes for EDHREC, and he plays a ton of Commander and makes a bunch of decks