even if he's only able to absorb an average of ~1% of the stats of mobs he kills with that skill, that'd add up pretty fast here with insect type mobs in huge colonies, especially if he drains bosses then takes his time draining as many of the debuffed mobs as possible
@yukihn96
while I get that what you said was probably meant as a joke, it's actually quite different
-Solo Leveling was about a guy who was ALREADY going into dungeons. he was really weak but made up for it with cunning and observational skills, then he got killed? and reborn with the power to grow with no known limits
-SLR on the other hand is about a kid whose brother became a powerful ranker in this dungeon space but got betrayed and killed (and not reborn, just dead) then the previously completely powerless brother inherited powerful bro's memories and (weakened versions of bro's) main abilities and is now using that knowledge and the skills to become OP and get revenge
...as best I can tell the "dagger" he picked up is a rare "item" that may or may not be truly unique but it either isn't 100% unique since the tutorial area seems to frequently reset OR it is unique, can only be obtained within that place, and somehow returns there if there is no one currently able to wield it because [insert semi-BS explanation about unique item properties in a world of magic and/or plot holes]