You use the 'enter-end combat jump' tactic to get over the rune. The summoned creatures are there to stop you bouncing back towards Erika.
You can also use this tactic to safely rob Shayder, (by jumping over the alarm).
I would create a fanny-whacker. Depending on which part of Emarian you used it, it either paddles your enemies on the behind, or hits them in the groin.
[stupid eBay. (Removed useless link.)].
It's a lot cheaper to give Levy the separate ingredients (mandrake, graymold, toadstools, energetic - Cost: 352), and make your own Know Brews, rather than buying them (Cost: 2200).
( Frugal Tips 'Я' Us)
What about the mad monks?
Monastery of the Sacred Tai Kwan Leap Fighting Martial Art Organization.
"We are the Youth Brigade of the Heaven and Earth Association."
You can, however, get inside in Avernum 3.
Unlock doors lvl 3 opens the doors. Then summon some monsters (to stop you bouncing backwards) and using the enter/end combat cheat to jump the rune. (This can take a long time to get it right).
But no, there's nothing inside the two rooms.