Group got to RoM final boss with no deaths and were killing Shade of Zal-Nur. Suddenly my character can't heavy attack, can't block, can't cast skills, can't do anything but move using WASD. The screen did not change, and there was no statue mechanic occurring for my character during this time. This was DURING the Shade of Zal-Nur phase, where there is no possibility that the boss could activate a statue mechanic on a character. As the healer, I died from not being able to heal through Zal-Nur's roar. After I died, I was resurrected, and still could not perform any actions. I remained unable to do anything but move doing WASD and died a second time due to the same bug. The group cleared the rest of the boss in about 3 minutes without any other deaths. This bug was the cause of the entire effort being a waste. It had nothing to do with my inability and was entirely caused by a game bug. Process a No-Death Clear for my character in Ruins of Mazzatun.