With war, comes death, and Transformers has some of the ... loyalty to humans and to his commander, Optimus Prime, would see him impaled by Scourge, and then shot in the chest with Scourges ...
This homaged the Decepticon "clone" of Optimus Prime named Scourge in the preceding series Transformers: Robots in Disguise, though ironically, this character was named "Black Convoy" in Japan.