Hey man, i did it pretty quick, and ive found there are two key factors in getting this quick: 1. Have a fully upgraded Voidwalker. His super, if used well, nets about three kills for each use. Its great. Combine that with Embrace the Void and the ability to give his super a void field, and its unstoppable. Throw it on an objective in a control match, and it gets ya kills. Not to metion the grenade. And they say bladedancers are OP.... 2. Upgrade a rare void fusion rifle. People will troll on ya, but its extremely effective. Heavy weapons, due to the dependence of infrequent heavy ammo drops, arent nearly as effective. Using these two techniques will get it to ya in no time. It only took me a couple hours of actual gameplay to get. Xyor on the other hand... took me a solid hour and fifteen minutes solo'd. I wish you and anyone else who reads this the best of luck in getting Thorn. Its a great weapon.