There are a whole mess of skeletons in there, and you're barely handling the skeleton you've got inside your own body. You might want to buff up a bit before you try your luck.
(It is recommended that you have at least 140 <mainstat> to adventure here.)
Each floor increases the ML of skeletons by 5 (confirmed by Monster Manuel)
Current floor does not reset on rollover or ascension, which also means that there are a limited number of skeletons in the zone. Players who have already completed the tower can still use a wanderer + Macrometeorite/Replace Enemy to fight additional skeletons for their sweet sweet factoids.