Despite the conditions of the environment, Jake was well-rested, so he was confident that he would do well. While he was approaching, it didn't take long for the creatures to notice him. A lot more of them noticed that, but only around fifty moved toward him. As if they were unmotivated to do anything else, they only used Fireballs to get him. Jake hid behind a boulder and the beasts tried to destroy that and while their power was something else, it would take a while for them to destroy the boulder, so they circled around it. Only to see Jake climbing it at the last moment and then jumping toward them. It would be better to start things like that to confuse the enemies even more before the real show.