You’re probably wondering how the heck a 6/4 artifact creature that costs 7 mana could beat the most difficult planeswalker in the game at that point. It was fairly simple.
I had a way to bounce his big artifact creature back to his hand after he brought it out with Tinker. Karn then got mana-screwed and didn’t draw any of his Moxen. In the meantime, I got up to seven mana and cast Razorfield Thresher.
The best part was that the Thresher was only in my deck as a total joke. It was a random card in one of the pre-constructed decks that the game offered. So, lover of jank that I am, it was just begging to be played. Since Karn was able to literally do nothing for several turns, I simply beat him in the face for 6 damage for a few turns. I then proceeded to win target game.
And that, my friends, is why Razorfield Thresher is awesome.
Now would you actually ever play Razorfield Thresher in an ACTUAL deck?
Honestly, I did a little digging around and figured out the best possible deck for Razorfield Thresher. It would be a Jasmine Boreal Commander deck, one primarily built around big, dumb vanilla creatures. While I'm not sure how competitive such a deck there is, there are plenty of strong vanilla creatures and lots of creature buffing enchantment that would make it viable.
Have you ever played Razorfield Thresher, even just in Limited? Would you ever play it just for fun?