Old School RuneScape Wiki
This article is about the buildable dark altar. For the dark altar located in the Arceuus House, see Dark altar.

The Dark altar is built in the Achievement Gallery of a player-owned house as a place where players can switch their spellbook to the Arceuus spellbook. Other players can use the altar, provided they at least have 60% favour with Great Kourend's Arceuus House.

The lowest level at which the altar can be built is 75 Construction, using the +5 boost from a spicy stew. The crystal saw cannot be used to lower this requirement, as the Achievement Gallery room requires 80 Construction and is unaffected by the saw.


Item Exchange price Total price
Limestone brick.png 10 x Limestone brick 1,800 3,560,955
Magic stone.png 1 x Magic stone 994,155
Arceuus signet.png 1 x Arceuus signet N/A
Blood rune.png 5,000 x Blood rune 1,835,000
Soul rune.png 5,000 x Soul rune 730,000


  • The book on the altar contains morse code, which can be translated as "darkness corrupts".