Witchaven/Level 10

From the start, drop down and go to the left for the brass key. The right-hand branch has a broad sword if you need one, but it is guarded by lava fiends. Continuing down the main corridor, the next room on the left contains a teleporter that will take you to a spot near the pentagram.

Return towards the main corridor and you are at a spot where there is an upper, lower, and middle path. Follow the middle path to the north. The door on the left is the straightforward path, but the right-hand one contains some treasures in the labyrinth beyond, including a Hero Time helmet, so follow that one. Either way, you will reach a big room of pillars where you will face the game's first dragon boss. Although it looks intimidating, fire resistance renders the dragon harmless, so take a potion and go beat it into the ground.

Bonus Areas

 * The elevated lava pools in the smithy contain an Onyx Ring and an Amulet of the Mist.
 * The throne room east of the dragon's lair contains a Nuke scroll.