You will Watch Transformers: Prime Season 2 Episode 20 online for free episodes with HQ / high quality. Stream cartoons Transformers: Prime Episode 46 Legacy. The Autobots are led astray with a decoy relic from the Decepticons, until Ratchet informs the rest of the crew of the real location containing the actual relic, the Star Saber. The relic is lodged in a mountain, and it can be removed only by an Autobot leader, a “Prime”. Optimus Prime is able to wield its power and sends a powerful attack to the Decepticons. Back at the base, Optimus Prime receives an incoming message from Alpha Trion via the Star Saber.