|Release date||7 January 2016 (Update)|
|High Alch||18 coins|
|Low Alch||12 coins|
|Store price||Not sold|
|A dark power infests this dense essence block.|
Creating dark essence blocks require 100% favour with the Arceuus House. Each dark essence block created gives the player 2.5 runecrafting experience while draining 1 prayer point.
It is used to substitute soft clay in the creation of Arceuus spellbook teleport tablets. It can also be used with a chisel to turn them into dark essence fragments, which provide 4 essence pieces per dark essence block, which are required to runecraft blood runes and soul runes.