This was EDH. I had just cast a Rith, the Awakener and passed the turn to my opponent. He was playing Mono-Green with Omnath, Locus of Mana and Seedborn Muse, and "went off" that turn by placing half of his deck out on the battlefield. Me and player nr.3 were dead on the board next turn, and player 3 couldn't do much about it and passed the turn to me.
I cast Xenograft naming Scarecrow. Then played my commander, Reaper King. The Omnath player had no creatures with reach or flying (mono-green, heh), so I hit him with Rith, creating over 40 scarecrow tokens while Reaper King harvested the entire board.
Epic turn was epic.