Capable of closing short distances very quickly, efficient and conservative use of your Stamina bar will be key to your success. One of its main attacks is a four-move combo, involving three swings back and forth with its sword, finishing with an overhead vertical slam. Again, with the speed of this opponent, it will be very difficult to keep any kind of distance between the two of you, so dodge-rolling through the swings and away from the slam are essential. If you're confident in parrying, you can interrupt any of the swings bar the final slam so attempt to get a critical strike there if you think you can execute the timing.
It can also get on all fours and launch towards you with a swing, then a 360-degree spin into a launch into the air and stabbing its sword into the ground. The stab with the sword has a lock-on that is best countered by staying underneath the beast as it's in the air and rolling at the last second; your I-frames will help with the resulting shockwave.
The beast can swipe with its left hand back and forth, then jump into the air, grab both ends of its sword and slam it down creating a larger shockwave, which is easy to avoid by rolling backward as the sword hits the ground. Also be aware that the beast can roar, which will damage you slightly and can even stagger you if your build isn't dexterous enough.
With dashing swipes at longer distances, the beast is best faced aggressively. A brutal move to watch out for at close range is a foot stomp, that immediately leads into two 360-degree spins with the sword. This above any other attack in this fight has the highest chance of killing you outright, as if you get caught during the first spin you will be hit by the second. You can block the foot stomp with minor impact on your Stamina, but be prepared to immediately execute two dodge-rolls to evade the swings.
Upon defeating the Misbegotten Crusader, you'll earn the Golden Order Greatsword.
