Well, it finally happened. Jiu Jitsu queen Mackenzie Dern made her MMA debut last night at Legacy 58. Her list of accomplishments seemed like it would be as long as the fight itself, if you don't know, this girl is ridiculously good at this BJJ thing. She even defeated Gabi Garcia at Abu Dhabi last year. Now, she looks like she's not too bad at this MMA thing either. Dern took the back almost immediately, she threw a big hip throw, and of course whenever she was on top it was dominant. Probably the most impressive was the ground and pound, which will prove to be a serious tool to use paired with her ground game. Surprisingly, her opponent Kenia Rosas defended all Dern could throw at her. Mackenzie Dern vs Kenia Rosas #Legacy58 SHE SURVIVES! SHE SURVIVES! pic.twitter.com\/bj4MhCGr17— Zombie Prophet (@ZPGIFs) July 23, 2016 Yeah, so, Rosas is Gumby apparently. Of course, Dern isn't a polished product, but her debut was successful and she stayed completely dominant the entire time. She will become very dangerous, very quick with experience and more time striking. Watch out the entire fight below and keep your eye out for Dern's next fight.