Hello
First of all congrats- I'm having lots of fun while playing your mod

Monsters are not overpowered (maybe Sandworms are bit tough, but not impossible to beat). Riddles are carefully designed but not impossible to solve. Maps are intriguing with some hidden goods. Great work.
But of course I have some problems with solving riddles and need help.
1. Where to find Iron Key needed to open Boss Fight in Rat Sewers?
2. Higher Catacombs in Wastelands- "Show that you know ways of death" riddle. I've found Embalmer's Pants in Lower Catacombs (hidden switch) but don't have keys to progress through and don't have an idea what to put into niches?
3.I've found Essence Temple in SE Wastelands location, where you have to put 4 essences in proper places to progress through. I've already found Earth Essence and Air Essence (left it somewhere in Castle where there was also Air Temple and I've got scroll "the archer may become tempest". Do I have to get Air Essence back from temple in Castle?
4. Cannot find a skull key needed in Miralk's Tomb on Swamp.
5. Rat Sewers location- near door with Boss Battle is a place, where are four plates on walls with inscriptions about order of doing something with them. I cannot figure out what are they reffering to.
Pls help