The thirteen Prime Masters may be small, but the power they hold is anything but—each one carries within them the spark of one of the original Primes, ancient gods of the Transformer race. When in spark mode, the Prime Masters can unite with a larger 'bot, bestowing upon them the powers of a Prime, to wield in whatever manner the bearer chooses.
This vast potential has made the small robots a hot commodity for Autobots and Decepticons alike, so to minimize this unwanted attention, the Prime Masters hide themselves inside special decoy armor, which cloaks their vast power from the outside world
Toys[]
Power of the Primes[]
The Prime Master toys are similarly built to Titan Masters, with the exception that the first wave of figures has a pin in the middle of their bodies instead of a screw (wave 2 onward returns to a screw). They also have their respective symbols on their back instead of faceplates, so using them as heads on Titans Return figures can yield some...interesting results. Outside of these differences, they are fully compatible with Titans Return toys thanks to peg-holes on the bottom of their feet, as well as their ability to sit inside vehicles and weapons like any other Titan Master. Their primary gimmick, however, is to be plugged into the Prime Armor on every Power of the Primes Deluxe and Voyager figure, as well as into the holders of Leader Class figures by replacing their central Matrix crystal.
The decoy armor for each Prime Master is shaped for them to fit inside. While the Prime Masters and Titan Masters can be interchanged with the armor, some figures are either too tight or too loose depending on the Prime Master inside the armor, while some just do not fit at all. The shells also bear peg-holes on the bottoms of their feet, allowing them the same ability to interact with Titans Return toys, though not to the same extent as their innards thanks to their larger size. The shells also come with small weapons with 3mm posts, as well as accommodating holes to carry said weapons. The weapons can also be clipped into the back of the shell's head for storage or folded over to become a Targetmaster-styled weapon. The Prime Master can also be folded up and pegged into posts near the feet to complete the weapon mode.