Titania

Ryan couldn't use Mana Reinforcement to increase the intensity of Sleep Resistance, but he could use it to increase the power of Wind Armor and thus make it level up faster. After a few hours, the skill reached level ten, and now Ryan could stand without relying on Telekinesis.

"I can't underestimate this foe just because it is a creature that would rather kill me in my sleep than in an actual fight," Ryan muttered. "To be able to use such a spell in such a vast area and for so long… this isn't an enemy that I can face while getting ahead of myself."