Hao Xuan's appearance was far too sudden for either party to react to. By the time they realized what was happening he had already landed in the middle of several undead creatures.
There were less than 30 seconds left before the nanotech would lose power so he decided to make use of every single moment before that.
Between him and the guards were close to five creatures, facing away from him.
Without saying a single word to the guards, he focused his complete attention on the enemies around him. It was already too late to pull out and look for another group so he needed to prove his worth to these guys so they would protect him in his moment of weakness that was just a few moments away.
Although he really disliked the idea of depending on others for support, for the time being there was no better option.