Sacrificial Elves

first get a bunch of cheap elves out on the battlefield. tap elvish archdruid to give you one green mana for every elf you control. a llanowar elves card also gives you one green mana when tapped. finally, on the mana side of things, arbor elf can untap a target forest, enabling more green mana to flow into your mana pool. after your elves are out (or while you are getting them out) you will want to play one or more thragtusk cards. you will gain five life for each thragtusk you play. finally you will want to play battle hymn or infernal plunge in order to fill your mana pool enough to play worldfire. this will exile all cards in all players hands, all permanents on the battlefield, and all cards in all graveyards and all players health will be set to one. heres the trick: when thragtusk leaves the battlefield you get a 3 3 green beast token while your opponent will have nothing out and no cards in hand and nothing to flashback. on their next turn they may be able to play a land if they draw one, but afterwards you can simply attack with your 3 3 beast and call it a day.