This is a quick guide and thus skips two optional rooms... but the other two are included for shrines/extra chests.
Further Instructions:
- The "normal" side will be referred to as the "Cold" side. The other side is aptly named the "Fire" side.
- Lighting torches can be done by luring the fire mephits over and having them breath on them or any such firespell.
- Blowing out torches can be done by luring the air mephits over and having them breath on them or any such cold spell.
- All party members must be gathered right on the portal/acolyte when it is destroyed/killed.
1 (Cold Side) - Head west and destroy portal.
2 (Fire Side) - Head south and destroy portal.
3 (Cold Side) - Head east and light torches.
4 (Cold Side) - Head back west and destroy portal.
5 (Fire Side) - Head north past the portal at location 1 and drop down and continue north. Destroy Portal.
6 (Cold Side) - Head south and light torches.
7 (Cold Side) - Head north and destroy portal.
8 (Fire Side) - Head south and blow out torches.
9 (Fire Side) - Head north and destroy portal.
10 (Cold Side) - Head east and destroy portal (or optionally destroy the Acolyte for shrine and optional chest).
11 (Fire Side) - Drop down to room and destroy the portal located behind the secret door.
12 (Cold Side) - Light torches.
13 (Cold Side) - Destroy Portal.
14 (Fire Side) - Blow out torches.
15 (Fire Side) - Climb up out of room and head east. Skip first portal you see and destroy portal at location 15.
16 (Cold Side) - Light torches.
17 (Cold Side) - Head south and destroy portal (or optionally destroy the Acolyte for shrine and optional chest).
18 (Fire Side) - Drop down and blow out torches.
19 (Fire Side) - Head north to center room and then east. Blow out torches.
20 (Fire Side) - Head back to center room for completion fight.
Val