Forgotten temple of Unknown

A huge port of stone in the snowy landscape in the mountain range east of Komarod, south of Oglub. The chamber inside has pillars as far as the eye can see (in the dark), and they carry symbols of - what looks like - powerful wizards.   The hall is 3 minutes to the left, and 5 minutes long, a huge door is seen on the wall. A trap protects the door, though disarming it starts several gears to rotate, five locks appears.   5 locks, evenly spaces, but above is a plate:

• 2 or 4 (in Dwarven)
• 1, 4, or 5 - never trust a goblin (Goblin)
• 6 - orcs can't count (Orc)
• 3 (Common)
• 1,2, or 4 (Elvish)

  Another plague above comes out, in Thieves Can't, which says "Pick in order, or not at all".   The riddle solution is to pick the order from 1 to 5. (5,2,4,1,3).   Behind the door, a bridge of stone allows passage to the other side, over a long line of lava. Entering a plateau, a doorway leads further into the temple, splitting the path in a T-crossing. Above it a plate says "Find the way through me, and you will find the treasures".   Stepping to one of the paths, a low clinging bell rings throughout the cave, and a faint howl can be heard.