Quest giver: automatically after using the teleport [Xardas Tower]
Description: This is a very short quest (M13, 1). Go straight ahead #1 and you will get to the tower. Speak with Xardas #2 (M13, 2). As a matter of fact a new main quest will be activated.
Rewards: The Hidden Grotto, 2000 EXP.
The hidden Grotto
Quest giver: Xardas [Xardas Tower]
Description: It will be good to search the area, you will find many scrolls here #1 and valuable items. When you will be ready choose the path leading downstairs #2 (M13, 3).
When you will be downstairs jump from one ledge to another. You have to get to cave entrance (Zoldren) #1 (M13, 4). First enemies are located near the first big room #2 (M13, 5) - these monsters are skeletons.
Ignore the south passage and go north-west (M13, 6). Soon you will be attacked by a fire golem #1. These creatures have many HP points so use the best weapon that you have. After the fight choose the northern corridor #2 (M13, 7).
You should be able to get to the lower level now #1. Eliminate all skeletons (you do not have to enter the western cave). To continue your mission go south-east #2 (M13, 8).
Soon you will find yourself in the place where the demon lord resides (M13, 9). This beast should be eliminated from the distance #1 - as a result no other enemies will disrupt you in the fight #2. After the battle take the key.
Go south. Watch out for new fire golems #1. from other enemies you will have to fight with some mages. After all fights jump down and examine the cave located south-east #2 (M13, 10), to find a very important plans.
Now you have to get back to the blocked passage (M13, 11). Choose the tunnel leading north-west #1 and turn south #2. Use the key to open these wooden doors and explore this new area.