In Gula's archeological site cave system are 2 doors - if you choose to unlock the left one first with the key you can find under some barrels, then you will find in the small room chest with loot and key for the other ( right) door where are the 2 pedestals - one for the cup you found in the asylum and which will remove the curse from the goblin/troll NPC. If you choose to unlock the right door first - the only thing you lose is one loot chest - nothing so important.
The password for the second teleportер in the asylum
is in document looted from one Necromancer corpse near the teleporter - just read the document and new option to use the password will appear when you interact the portal. Don't remember well but I'm almost sure the key for the troll/goblin NPC cage is in that corpse also
