You will Watch Transformers: Prime Season 2 Episode 21 online for free episodes with HQ / high quality. Stream cartoons Transformers: Prime Episode 47 Alpha; Omega. Alpha Trion informs Optimus Prime about the last four remaining relics left in play, those being the Omega Keys capable of regenerating Cybertron. Megatron goes to Cybertron and desecrates a sacred tomb of a Prime to obtain it’s hand so he can master the Forge of Solus Prime. After using the Forge to create the Dark Star Saber, he challenges Optimus Prime to a battle in which the Star Saber is destroyed. This unwittingly allows Smokescreen to retrieve the Omega Key, with some help from the Phase Shifter, and he and Optimus return to the Autobot base, and Smokescreen receives the Phase Shifter as his permanent weapon.