Roaches
Even though Hao Xuan had great eyesight, he couldn't see through this fog for some reason.
They had come across many different kinds of beasts in the last two days and even though there were a few quite powerful ones, it wasn't anything too bad. Hao Xuan tried killing a few to see if he could get these words of power as well but it didn't work for him. At least not in the conventional sense.
With Baracus's advice, he started trying a few different things, going through the scientific process of eliminating each method one by one. But he needed to kill more a lot more beasts for that and was always on the lookout for some.
He turned towards Salome who was peering down into a lava tunnel and flicked him on the forehead.
"Hey, stay here. Don't go anywhere alright?" only after getting a solid confirmation did Hao Xuan leave. Fortis would keep him safe from any serious danger and he should be done relatively quickly so he wasn't really worried.