It'll only expire if the targeted creature leaves the battlefield
It's responsible for many explosive starts, which is why it's often an auto-include, and (presumably) why Frank included it but no additional ramp when doing the math on his Lands count
Usually, Roulette Barrel and Needle Wall will be played as continuous removal options, clearing the way for aggressive monsters to swing in at the opponent unhindered
The purple, spooky Pokmon has developed a rabid following, much like other popular anti-heroes such as Venom and the Joker
This is a strategy as old as time, but it has had its struggles in Duel Commander recently
With these out-there options available on top of the ramp classics, theres never been a better time to go big and go green in Commander