The Black Hole Server is a secret server in Mega Man Star Force 3 that the player can access after beating several Rebuilt EM Beings and Rogue Z. It is a massive server made from the powerful electromagnetic waves of the supermassive black hole located at the center of the Milky Way. The entire server is controlled by the EM Being Sirius. It is capable of consuming EM Beings, their data, and planets, then recreating them. Such recreated beings are referred to as Rebuilt - or "R" - beings.