Mark of Sakiko is one I never see, and its probably because players dont like to play auras
Blighting creatures has an impact on the game no matter what, with you either drawing cards or having opponents lose one life
Its a low-key, long-term pursuit, and it absolutely doesnt need to be expensive
Jace, Wielder of Mysteries is a key alternate win condition in Commander and fringe Modern decks, especially ones built around self-mill or infinite draw loops
Archenemy Rules Archenemy is a casual variant format that can be appended to any other multiplayer game of Magic
Even if you play straight two colors, it wont be hard to get to eight lands, and its well worth spending eight mana to draw three cards, gain life, and potentially kill a creature