After completing the Desert Treasure quest, Old School RuneScape players receive The Important Letter from a messenger. After it is destroyed, it cannot be re-obtained by a messenger. The Frozen Door mini-quest begins when you read the letter.
To receive the letter, players need:
- 70 Agility
- 70 Hitpoints
- 70 Ranged
- 70 Strength
Related: What is Wrapping Paper in Runescape?
To complete the quest, players need:
- A Mith grapple
- A crossbow
- Two ropes to reach Saradomin's Encampment
- A Hammer or Dragon Warhammer
The letter reads as follows:
Dear [player name],
We have sadly not yet had the pleasure of meeting, but I have been a great admirer of your work for some time now. I recently acquired some information that I found to be quite exciting, and wanted to share it with you.
Deep beneath Trollheim, there is an ancient dungeon where four armies are locked in endless battle. Within this dungeon, there is a frozen door behind which lies treasure unlike any other. However, the door was sealed long ago by the leaders of the four armies.
I believe the treasure behind that door will be of great appeal to you. If I am correct in this assumption, then seek out the leaders of the four armies. Each of them should have a piece of the key needed to unlock the door. Assemble the key, and you will have everything you need.
All the best,
Your admirerFrom The Important Letter
Despite identifying themselves as an "admirer," the letter's author intentionally tricks the player into opening the Ancient Prison where Nex, one of Zaros's most powerful generals, is imprisoned.