|Weight: 1 Stone|
|Lifespan: 21600 Seconds|
Other than the fact that Irk's Brain is dark grey, it does not look abnormal. It is one of the six keys needed to gain admission to battle Dread Horn, the Peerless of the Twisted Weald dungeon. Obtained from Irk corpses, Irk's Brain drops randomly and comes with a countdown timer. The brain will disappear when the timer expires.
When all 6 keys are collected, they each need to be dropped onto the statue that is located in a stone ruin in the southern area of the Weald. The statue sits on an altar that is surrounded by rocks and dilapidated walls. The keys are: Blighted Cotton, Thorny Briar, Gnaw's Fang, Irk's Brain, Lissith's Silk, and Sabrix's Eye.
- Irk's Brain is considered the most difficult of the keys to obtain.