Dungeon of the Mad Mage

Leowin draws his dagger and scrapes some of the stained stone. As he does, stained chips and dust gather into a little pile. Wordlessly, wraps the pile of bits in a small square of cloth, ties it closed and puts in his backpack.

"Well. That sucks. Where to next? I could use an ale and some female company...."

Sig shrugs and continues along the zigzagging corridor. After a while it leads back to the outpost where the goblins were killed. There is only one route left unexplored, that is to the south. Following it along you come to a closed door

Leowin inspects the door, checking for a lock and trying to peer around it and listening for sounds from the other side.

Investigation 12

The door is unlocked and unbarred. You can see heavy footfall in the dust on the floor, suggesting this is a main route through this level of the dungeon. 
You hear nothing from the other side of the door

Leowin slowly opens the door, trying to subtly peek around it.

18

A 30-foot-wide, floor-to-ceiling map is carved into the west wall .

This elaborate image is a cross-section map of Undermountain, with what is clearly Mount Waterdeep and the City of Splendors at the top, and twenty-three hollowed-out dungeon levels stacked below it. Each dungeon level has its own stylistic side view, but no names or details are included to suggest what a level is called or what it contains. Three features stand out:

• Next to the third level is a bas-relief of a flaming skull.
• Next to the sixteenth level is a bas-relief of a comet.
• Next to the twenty-third (lowest) level is a bas-relief of a tower with a tiny rune engraved above it.

Close inspection reveals that the flaming skull, the comet, and the tower are buttons that can be pressed.

Leowin pushes the door open and walks in, before standing in front of the map with a nonplussed expression

Jhee-Kharr grabs the calligraphy supplies from his pack and does his best to transcribe a portable map, trying to make heads or tails of it as he does so

Flaming Skull : Each time this button is pressed, a magical, disembodied male voice fills the room and says in Common, “Gate access to Skullport disabled.”

Comet. This carving represents Stardock, the asteroid orbiting Toril that is connected by a gate.  Each time this button is pressed, a magical, disembodied male voice fills the room and says in Common, “Gate access to Stardock from level 16 only.”

Tower. This carving represents Halaster’s extradimensional tower, and the tiny glyph above it is Halaster’s rune. If this button is pressed, a magical, disembodied male voice fills the room and says in Common, “Gate access to Halaster’s Tower from level 23 only.”

Eoan frustrates by the map riddles clears his mind and takes note of all his senses to find out if there’s more to be gleaned from the room .

perception 16

Eoan senses a secret door to the south, a faint draft from an imperfect door seal tickling his finely tuned senses

Eoan inspects the door and attempts to force it open with the crowbar in his pack 

It opens surprisingly easily, courtesy of the crowbar and Eoan slides the door open. A tunnel leads down and then turns left out of sight. 

Leo scouts ahead, weary oh what could lay ahead, cursing that the group are still stuck down here, and will surely face further trails ahead to get out for some much needed rest

Stealth 26
perception 21
survival 21

primeval awareness 

You creep down the corridor and around the corner, treading carefully to avoid making noise and checking for traps. Finding none you look out into a room. 

Hall of the Two-Headed King

A deformed granite statue stands on the east side of a large stone column, facing eastward. The statue is life-size and depicts a dwarf king standing atop a 3-foot-high stone pedestal. Sprouting from the king’s neck is a deformed, mostly featureless second head with an elongated, toothless mouth. The inscriptions on the pedestal have been worn away. On the king’s brow rests an engraved stone circlet, and his large hands grasp the handle of a stone warhammer, the head of which is planted at his feet.

The room opens out onto more chambers and you can hear the cacophony or arguing goblins coming from a room to the north. 
Anyone wishing to examine the statue can give me a Perception check

Perception 13

Leo creeps closer and notices that the king’s warhammer is a separate piece of stone that can be rotated. When the warhammer is turned so that the weapon’s backside faces forward, the pedestal rises another 3 feet, revealing an open cavity that contains a magic circlet identical to the one worn by the statue — but fashioned from gold rather than stone.

Closer inspection of the circlet reveals it to be a Circlet of Blasting

Leo lifts the circlet out examining it. He hands it to Carilius 

my friend, perhaps this would best suited to you

Why thank you my friend, I’m sure I will make good use of it, Carilius gratefully takes the circlet