Don't know if this has been posted yet but I was playing EDH with my brother an I stumbled upon this.
{Archeomancer} + {Devistation Tide}
This combo won me the game
I got it on him four turn in a row, then he played {Phage, the Untouchable}. On my turn I o-ringed her then cast the mancer targeting the tide of course, and cast the tide. Returning my Mancer and O-Ring to my hand lol.
Lol, un o-ringed phage for the win. CLASSIC.