Yalwog is an optional Side Mission which is home to the legendary Golden Pheonix.
This level is said to be the origin of all Fire Monsters, the fearsome Red Dragon can be found as a standard monster.
The level has four main areas and a central area housing the Golden Pheonix's temple. Katia must explore the area and look for the source of the Black Water that is ruining the area. Once she defeats the source of the water, she must speak to the Phoenix to end the level.