I was just thinking about a few of my wins (and losses) over the years, and realized that some of the most memorable games I've played came down to a move that was either very situational or was just something that came completely out of left field (either by luck or design). Just figured it'd be neat to share a few of the good ones and see what others have had happen to them. So here's a few:
Running my blue/artifact Affinity deck against my buddy's blue Doppelganger deck, I managed to get so many free creatures that he simply could not deal with it all and he was screwed on the next turn. After a few minutes trying to find an out, he cast Braingeyser and targeted me. He had exactly enough mana to force me to draw the remainder of my library, causing me to lose the game during my draw phase.
Opponent had a Platinum Angel in play and got a bit cocky, allowing me to deliver lethal damage to him. I then proceeded to cast Sapphire Charm to cause the Angel to phase out.
Opponent has Ink-Treader Nephilim in play. I have two Blood Artists in play. Total number of creatures is 11. I cast Terminate on the Nephilim, causing him to lose 22 life and me to gain it.
In a multiplayer game, one of my opponents drops an Eon Hub. This turned my Sapphire Charms into effective creature removal (no upkeep step = creatures don't phase back in).
Opponent uses an infinite mana loop to draw and cast/discard around 3/4 of his library trying to find his win combo. Knowing he's running Force of Will, I hold on to my Counterspell until he has no cards in hand. They cast Time Spiral, which I counter, which pretty much sealed his fate.
First turn, my play. Swamp + Dark Ritual + Entomb on Nicol Bolas + Shallow Grave = Opponent has no hand, nothing in play, and only 13 life. If only I could get a few more Entombs in that deck...
Anyway, it's almost 5 am, so I'm done for the moment...let's see what we get here