Use the Glass Key to get into the Ice Sorceress's Room.
Type SIT THRONE once everything is dead in that room.
You will get +1 to ArmorClass
From MudVille:
Kill the Yeti in the Frozen Caverns off the Rocky Trail
Take the key the Yeti drops and proceed to the Tower.
Head South and West until you find a room with a crystal in it
Turn the Crystal, and follow the secret passage
Follow the path around, pulling the switch and rope
Kill the Ice Golem
Use the key you got from the Yeti to open the trapdoor above you
Find and Kill the Ice Sorceress
After her untimely death, sit on the throne
To get out of there, push the wall in the secret room, go west, and push the button
Your reward is a 1/0 increase in your AC.
From MudCentral:
First, travel through the darkwood forest to the path just northeast of the blue tower. Then travel this path to get to the burnt stump:
NE,N,N,NE,NE,NW,N,NW,NW,N,N,N,NW,NW
Then, GO HOLE to get onto the narrow stone passage. Follow this east until you reach the cliff. Here, SAY FAITH and a secret passage will open to the north. Go north into the small chamber. Above you is the rocky cliff. Follow this path to get to the Rocky Trail's fork:
U,S,S,S,SE,S,S,E,E,NE,NE,E,E,NE,E
At this point, follow this path to the frozen caverns:
NE,NE,N,NW,NE,NE,NE,E,E,E
From here, follow the frozen caverns to the Yeti:
NE,E,E,E,E,E,E,E,NE,SE,S,E,SW,E,E,NE,SE,S,S,S
Here you kill the yeti to get the glass key to open a door to the sorceress which you reach later on. Bash the door to the south to enter the Tower. Go 4 rooms south, then bash the gate west. Go west. At this point, TURN CRYSTAL and follow the secret passage NW.
Then go E, Up, W, N, W, NE, E, SE. Here, PULL SWITCH.
Then go W, and PULL ROPE. Go Up, W, S, E. Kill the Ice Golem.
Then use the glass key from the Yeti to open the door above you.
Go Up, W, N, and East to get to the Ice sorceress.
After you fight her, everyone should SIT THRONE in order to get one more AC. This can only be done once, however. If you live, congrats! (hint) Watch out for those ice golems- they can tear anybody apart.
(to get out of the secret passage room on the way back, PUSH WALL.)
(to get out of the secret passage, go all the way west & PUSH BUTTON.)
Dan's Tip: Cast Resist Cold on as many people in you party as possible before entering!