Greater skeletal thralls are undead that have been resurrected via the Resurrect Greater Skeleton spell. Besides the required runes, summoning greater thralls requires six prayer points and having the book of the dead equipped or in the player's inventory.
Greater skeletal thralls have an attack speed of 4 (attacking every 2.4 seconds) and attack using Ranged (with a max hit of 3), ignoring any accuracy checks in the process. They will attack the same target that the player is attacking, and cannot be damaged. However, they cannot attack other players.
Thralls will remain for a set amount of time ( seconds), but players can cast resurrection spells again after 10 seconds, albeit the existing thrall will disappear if players do so.
The following Combat Achievement tasks involve thralls.
|Sit Back and Relax
||Deal 100 damage to creatures using undead thralls.