Right, left, ehh... is this a maze?

Entering the door, the adventures travels pass lava beneath them, the door slamming behind them -trapping them inside a dark tunnel.   As the travel into the dark, around a few corners, a small room with the number '12' written on the wall in a red coating is seen, and ominous cries can be heard.   Splitting the party, Horgar ventures backwards, and finds the numbers '11' written on the wall. More ominous cries can be heard... by both parties, even though they are far apart. As he stumbles forward, more drawings can be seen on the walls.   Meanwhile Calu', Natalis, Erst and Sandra still can't find a path back to Horgar, but cries are heard. Erst recalls this is not actual cries, but more of an arcana nature, meant to test those trapped in the maze they find themselves in.   Horgar notice this is confusing, and starts putting down stones when he turns, though he finds himself lost. Another painting shows wizards fighting a floating, white woman with crazy eyes. It seems familiar, and this white woman might be undead, but can't really recall from where. Traveling further in, he spots a '9' on the wall.   The four others continues with yet another ominous cries hanging in the air. They find the number '8' on the wall. Upon inspecting the blood, Natalis notice this is magic of the type conjuration - not real blood. Continuing onward, they find themselves even more lost.   Horgar notice the stone has turned brighter into limestone, and as he continues, he finds a pebble he have lain down after the number '12', but before '9'. Taking the path unexplored, he finds the number '7' after some time, with more cries heard in the maze.   Calu' finds a door with Abjuration and Divination, along with other symbols, which might be religious. Further inspecting the room, they notice small holes in the walls, which they fill with additional clothing they carry. As Sandra picks the lock, it opens into a room.   The room is 15 ft x 15 ft, with paintings (same as outside) with a the symbol for Divination and Abjuration clearly separated with two figures. Two crystal balls are placed on pedestals in the room. Inspecting closely, the crystal balls have an arcane essence, and the hands have an arcane essence.   Three other doors goes form the room as well - or stone doors, with wooden frame. As Calu' and Erst tries to open one of them, the roof starts to crumble a bit, stopping them in their action.   Horgar finds a stone door with Enchantment and Evocation on it , and the door has small nozzles around it. He spends some time trying to destroy them, before he starts opening the frame of the door. Finding a mechanism inside the door frame, he starts to destroy it, triggering a trap. Not too bad, he peels the door open, and finds a room similar to the room the others entered. Two crystal balls are found in there as well, which he places "incorrectly", resulting in the room staring to collapse around him, almost killing him as rocks hits the ground around him.   Necromancy and Transmutation is found on a third door Calu' inspects. Natalis cast Prestidigation (transmutation spell) on the door, and it opens up, leading into a room similar to what what was found in the other two rooms. Placing the balls accordingly, a door slides open to a fourth door.   The fourth door is made of glass and a black-sodded material, reveals a illusion and conjuration. Natalis uses a Minor Illusion on the door, making it swing open. Placing the balls accordingly, a door slides open to reveal a cooridor.   Horgar realizes he can't get further this way, he starts walking back through the maze with a bottle in his whiskey in he hand, wounded and bleeding. He stumbles upon a metal door, starting to pick the nozzles apart. The group notice it, and Calu's goes to inspect, finding Horgar bloodied. Leading him back to the group.   The walk to the second room reveals rubbles, which they try to clear out, but to no avail. The crystal balls are gone, and they can't get them out. They start to head for the entrance as well. When they find it, the door is still closed.   In frustration, they start to to follow the walls systematically, finding both number '2' and '1'. They head back to the magical rooms, but finds nothing new. Calu' sits down to pray for guidance to Bahamut (his deity). In a vision, a small canarie lands on his finger, and flies through the wall - indicating the room they must go to is behind them, in the middle of the four rooms.   Sandra suggests there might be something about something white. Not able to find what it was - perhaps the limestones, they open the last door leaving away from the four rooms.   As they walk through the corridor, they discover the last number, '0', and a banshee emerges from the wall.