We play in a league that involves a ante system with so-called "points". We also have a achievement sheet, where you do a achievement you either get or loss points. Infinite combos and mana-only land destruction loss you major points, which ususally stops anyone by winning with them. Also, the guy who runs it (one of…

In my EDH league, I can honestly say that half the decks use oblivion stone… It's a staple…