Grimskull

&nbsp Boss Grimskull was the warboss that led the Ork invasion of the forge world Graia. The Orkish invasion met with great initial success, and a force of Space Marines under 2nd Company Commander Titus were sent to protect the tactically important Titans located on the planet.

Titus first encountered Grimskull when he arrived on Graia. He landed on the Boss' warship and destroyed it. This started a feud between the two that Grimskull took very seriously. He attacked the space marine when he was retrieving the experimental power source of Inquisitor Drogan. Upon seeing the "sparky thing" Grimskull felt he needed to have it.

Titus used Grimskull's hunger for the energy source to lead him and his Orks across Graia to distract them from his allies. This plan worked. The Ultramarines got the power source to Drogon and used its power to fire the Psychic Scourge. Unfortunately, it did not destroy the Orks. It opened a gate to the Warp, out of which sprang a host of Bloodletters and the Chaos Marine Nemeroth. Grimskull fell from the heights covered in Bloodletters. After Nemeroth tortured Titus and his companions, Grimskull came back to fight, proclaiming "I ain't that easy to kill!" He and Nemeroth engaged in melee combat, and they plunged over the edge.

Unfortunately for Titus, the next time he encountered Grimskull, he would have to face the Warboss without support. Grimskull fought the Ultramarine, using his WAAGH as cannon fodder to distract the Ultramarine. Sadly, the tactic did not work. Grimskull's mighty armaments and followers could not stop his death at the hands of Titus. As he was laying on the ground, he said to Titus "I ain't done with you yet, Space Marine!" Titus cooly responded "But I am done with you," and executed the War Boss.