Goumur's Final Hunter

At the beginning of the game, declare that you have Goumur's Final Hunter is in your deck. While it is in your deck, when a Green creature is destroyed, you may reveal the top three cards of your library. At the beginning of your end step, return all cards drawn this way to the bottom of your library. If Goumur's Final Hunter is one of the revealed cards, you may summon it as if it had Flash and without paying it's summoning cost.