These are the moments before Aran made his way to rescue Lisa from her demise.
Gayle continued to bash down into the corridor of the looming cave room with Aran supporting him from the rear. Monsters have gathered around the entrance of the dungeon because of the wyvern's awakening. If it weren't for that, they could've reached the other side of the entrance quickly. However, they are impeded by the array of monsters seeking the depths of the abyss for salvation.
Aran swung his black knife left and right and then he turned around to kick the lich on the flank. He figured out their way of attacking and dodged their spikes consecutively without stopping. It took time from both Eunice and Nikki to impart a way to counter the lich but Aran seamlessly killed them like it was nothing. His knife goes through their skeletal frame and then he destroyed them with a powerful kick.