At first, Alissa thought Ryan was only uncooperative and unsociable like always, but since he looked deep in thought about something, she decided to concluded that wasn't the case.
While Alissa was preparing her attack, Ryan disappeared underneath the snow and approached the dire wolves' dungeon. Although all that snow worked to fortify the defenses around the dungeon and wolves had no problem running over it, the monsters were wrong if they think that they were the only ones who could benefit from it.
It took a while since Ryan made sure that he didn't make any noise or left any trail of his presence, but eventually, he returned to the point where the fight started and in which he could see the dungeon. Although the area in front of the place the snow wasn't so deep, the snow's concentration above it really makes it look like the dungeon was located in a snow mountain.