There was one game in testing recently where I was playing Grixis versus a shops deck. I had dealt with most of his threats, though he still had some spheres out. I had a jace on board. My hand at the end of his turn was Hurkyl's, Drain, Blightsteel, Snapcaster, Scroll, and Ancestral (My jace had been active for several turns). I had 10 mana in play(1 was a Lotus, so I had lots of blue). At the end of his turn, I ancestraled, drawing Fow, Fow, and another blue card. This was incredibly lucky on my part, because I now had the means to cast a more resilient win condition than Jace. After the ancestral, I hurkyls'd him and untapped. I drew a mox. I played Snapcaster, and Forced it, pitching Scroll. In response, I drained my force. When Snapcaster resolved, I targeted drain. I bounced my snapcaster with Jace, and replayed it. I Forced the Snapcaster again, pitching the random blue card. I drained the Force from my graveyard, and when the snapcaster resolved I targeted ancestral.
I went to my second main phase, and added 10 mana to my pool. The mox I had drawn allowed me to hardcast blightsteel and then have a blue left over to flashback ancestral for value. I had to get very lucky to do this, and the funny thing is that this play only ramped me by 2 mana. It was enough to win the game, however. I probably could have won over time, but this play was too awesome to pass up(Also, Snapcaster was useful for once

).