I'm stuck in exactly the same place. I also found the place that seems to want an item, but I suspect that there's more to the pillar. Some things that I've tried which didn't work, just in case one of them sparks something for you:
1. Tbvat gb gur fcbg rknpgyl gjb fdhnerf abegurnfg bs gur cvyyne naq frnepuvat. Guvf fcbg vf uvqqra oruvaq n erq gerr, fb V jnf ubcrshy, ohg ab qvpr.
2. Hfvat rnpu bs zl vgrzf ba gur cvyyne 33 gvzrf.
3. Onpxgenpxvat gb gur fuberf naq frnepuvat gur 3 cvyyne gjvpr. Ab yhpx.
4. Cynlvat gur flzoby ba gur "cynpr jurer fbzrguvat svgf" ba gur syhgr fbzrubj.
5. Pebff-ersrerapvat jvgu gur fgryr va gur pnir onpx va gur juvgr jbbqf jvgu ahzore flzobyf ba vg naq zvavat nebhaq gur cvyyne va n cnggrea pbeerfcbaqvat gb gur flzobyf. Guvf qbhoyr-rkgen qbrfa'g jbex orpnhfr gur hccre-yrsg pbeare vf oybpxrq. Nyfb, vg jbhyq unir orra evqvphybhf vs guvf jnf vg.
Abj V'z ehaavat nebhaq naq ybbxvat sbe pyhrf va gur funcr bs gur raivebazrag, juvpu vf n yvggyr ovg grqvbhf jvgu gur whzcvat thlf. V fgvyy srry yvxr gur arkg chmmyr vf zbfg yvxryl ng gur cvyyne vgfrys...gung'f ubj vg'f frrzrq gb jbex jvgu cerivbhf ngynf ybpngvbaf.