Artifact 117, a forerunner sheild world, was founded by the crew of the UNSC Spirit Of Vengence. Little is known about the inhabitants, the forerunner warriors. These strange A.I beings were designed to defend the world from the flood out-break. They are somewhat similar to the promethean knights In a way. These warriors are now programmed to destroy intrudes.
The planets defense systems are powered by a series of beam generators that are located near the core. Once active, they will destroy any ships that enter the atmosphere. As Deciple 5 entered the atmosphere, they were not shot down because it was so damaged, the defense systems thought it was just parts of a ship. Once they located these beams, they were shut down. The planet also has a gravity well which explains why the spirit of Vengence was pulled in.