The Void Knights are a military order who have helped serve Guthix and his penchant for balance since the early Fourth Age.

Requirements
Having 40+ Combat
Items Required
no required
Reward
100 points

When all the portals are destroyed you will get a coin reward depending on your combat level along with Void Commedation points, 2 in the Novice boat, 3 in the Intermidiate boat, and 4 in the Veteran boat. With these points you can buy a variety of different items. The full list is shown in the image below.
To buy the armor, the Mace, or the helms you need 42 in Attack, Strength, Defence, Hitpoints, Ranged and Magic, as well as having 22 Prayer or more.