Cubes built around themes like snow, or loaded with artifact or enchantment creatures, will get a lot of mileage from Embiggen
Put that card into your hand if its a land
Its being warped by the eldritch influence on Innistrad, the plane which this card comes from, and its already taken a chunk out of the poor persons finger
In addition to the obvious things like Syphon cards (do some effect to each other player, gain benefits depending on how many other players this hit), there are cards that affect a random opponent, cards that give everyone the game the ability to join forces to create a big effect (for example, a sorcery that lets everyone pitch in mana and then lets everyone put lands into play from their decks), and Enchant Creature cards sorry Auras that boost the creature while preventing it from attacking to
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Going wide with Auras has historically been less viable, but in todays Commander climate, you should be forcing your opponents to play more board wipes