Slayer Codex

A Slayer Codex can be used to track all the slayer monsters killed. It is given to the player by Faiza. Obtaining the codex requires 99 Slayer. Creatures are added to the book through Ushabti after taking captured souls to the Chest of Souls.

The first Ushabti of a creature that the player turns in gives them full experience, and the following Ushabti of that same creature gives the player 25% experience.

After collecting the souls of 50 different monsters, the codex can also teleport players to the Sunken Pyramid.

There is currently a bug that will log some players out when selecting some monsters to view in the Codex.

There is currently a possible bug when killing Icefiends on Ice Mountain, as players are unable to receive souls from these creatures. Ghorrock Fortress does seem to still be a viable option for those with it unlocked.

Slayer monsters
In order to fill the entire codex, 117 Slayer and 115 Dungeoneering is required. Some monsters can only be killed while on their respective slayer task.