1. Talk to Sir Amik Varze. He wants you to spy on the Black Knights for him at their fortress located at Ice Mountain near Edgeville. He wants you to find out what their new weapon is and destroy it.
2. Go to the Black Knights' Fortress. It is north-east of the Dwarven Mine and the NPC Oracle, north-west of the Monastery.
The yellow square shows where you'll find the cabbage.
3. Wield the bronze med helmet and iron chainbody, and enter the fortress. Once you are inside, the wall right in front of you can be pushed. Push it to enter a small room.
4. Climb up the ladder twice, then Climb down the ladder just south.
5. Go through a door to the east, and go climb up another ladder.
6. Climb down the ladder immediately to the east beside the one you just came up and you will end up in a room with a chaos prayer altar.
7. Open the sturdy door and Climb down the ladder.
8. In this small room, there will be a grill. Click on it to listen. You will hear a conversation between the Black Knight Captain, a witch and a goblin.
9. After listening to the conversation, we are back to where we started.
10. Now run and open the east door and climb up the ladder on the northern wall of the room.
11. Run to the end and push the wall:
12. Now use the cabbage with the hole that should be in the room.