An abyssal head is a very rare drop from Abyssal demons and their superior counterpart, which require 85 Slayer to kill. Players may also obtain an abyssal head by placing an unsired at the Font of Consumption; this has a 5/64 chance, and as an unsired is a 1/100 drop, this effectively makes it a 1/1,280 drop.
It can be combined with a slayer helmet or slayer helmet (i) to create a red slayer helmet or red slayer helmet (i), respectively. Doing so requires purchasing the ability Unholy helmet for 1,000 slayer reward points.
It can also be stuffed and then mounted in player-owned houses in the Skill Hall at level 58 Construction, but it is a one time use and it cannot be reclaimed.
If players wish to have the abyssal demon head mounted, it must be taken to the taxidermist in Canifis. She will charge 12,000 coins and take the abyssal demon head away, giving them a stuffed abyssal head. They can then mount it in their player-owned house using 2 mahogany planks.