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This multiplicative effect provides an endless supply of sacrifice fodder for his activated ability, which allows you to sacrifice Squirrels to give a creature +X/-X
Once a case is solved it stays solved until it leaves the battlefield
Gix, Yawgmoth Praetor While not many people use Gix, Yawgmoth Praetors second ability, its there for when you want to discard a handful of lands and, in turn, play free spells from your opponents side
At least one or two of those realms are winter wonderlands