Uhm. This probably won't work, but it is worth a try.
Opponent plays an Unstable Gas.
You:
Quantum Tower x 2 + Obsidian Tower x 1.
Result: 1
, 6
Use Steal on his Unstable Gas, and ignite it.
Play Long Sword and Drain Life x 2.
I'm not sure if Unstable Gas can be played on that turn, so, yeah. :/