Later, when the sun set, Sentinel called Optimus to him and told that they would be going to Trypticon. Ironhide, who was among the Thetacons, asked them what they would do with the Allspark and Sentinel told told them of freedom - a word which had not been spoken since the time of the Primes - and that it was the right of all sentient beings and that it would be their pledge. As the sun appeared, the battle with the Thetacons ended and they made peace. Because they could not harvest a star, they hoped that mere proximity to a star would be enough to power the Allspark, so they worked to eventually warp reality and bring a star to Cybertron. One day, Sentinel and his team, which included Optimus, Megatron, Elita-One, Shockwave, and Wheeljack were attacked by a tribe called the Thetacons while they attempt to power the Allspark. It was believed that the only way to power it was to harvest a star but Cybertron wandered aimlessly through space and the means of interstellar travel was lost with the Primes. During a time when Cybertron was low on energon and tribes gathered together to fight over the remaining energon, Sentinel Prime unconvered the Allspark cube from deep within Cybertron. Sentinel Prime was one of the Primes - a direct descendent of Primus - the first Cybertronian. Film Transformers: Foundation (Official prequel to Dark of the Moon) (From left to right, top to bottom) Megatron, Sentinel Prime, Optimus, Shockwave, Elita-One, and Ironhide on Cybertron. Sentinel Prime is an arrogant jerk and often tries to give Optimus Prime a hard time, and tries to impress their leader Ultra Magnus. In this version, "Prime" is a lower rank that's held by multiple individuals. Transformers: Animated Sentinel Prime as he appears in Transformers: Animated Orion Pax would then succeed him as Optimus Prime. There was then peace for millions of years, until Megatron rekindled the civil war and defeated Sentinel in combat. The Decepticons had greater numbers and more firepower, so during Sentinel's reign the concept of transforming was devised to defeat the Decepticons through stealth. During the war, he eventually gained the Matrix and became Sentinel Prime, the sixth leader of the Autobots. He helped in the revolt against the Quintessons and forced them off the planet, but their absence caused a civil war amongst the Cybertronians to erupt splitting the race into the Autobots and Decepticons. He was originally Sentinel Major, forced to fight in gladitorial games during the time the Quintessons had enslaved the Cybertronians. He had the upper hand at first, but ultimately Megatron overpowers him and kills him. Battle erupts and Sentinel dons the Apex armor to fight back. The traitor Starscream along with Soundwave successfully sneak attack the senate and release all the prisoners, led by Megatron. Megatron's illegal activities came to Sentinel's attention and he arrested Megatron and his followers, but the senate forced Sentinel to release Soundwave. He disliked politics and held much disdain for Cybertron's ruling senate. Sentinel became Prime after the disappearance of Nova Prime. Sentinel wasn't a fool though and didn't bring the Matrix with him for Megatron to just take. In the beginning stages of Megatron's new war, Sentinel tried to negotiate with Megatron but was attacked and brutally killed by him. Sentinel was a pacifist, more suited for peace-time leadership than war-time. Sentinel was downed in combat during the war with Megatron and personally gave Optimus the Matrix of Leadership before he died. Major Story Arcs Marvel Comics Sentinel Prime passes the matrix down to Optimus