|First Appearance||Shadow the Hedgehog|
He has a 3rd eye sometimes called Dooms Eye that watches and tries to instruct Shadow to do his bidding and corrupt him. In his efforts Black Doom once even takes Shadow and tries to show Shadow humans are bad by showing him through Shadow's mind the moment Maria died when she was hit by a bullet by a G.U.N. solider.
Shadow The Hedgehog first meets Black Doom at the beginning of the Shadow the Hedgehog game. Black Doom tells him it is time to get the 7 Chaos Emeralds and as he finishes saying this Black Arm aliens are seen falling from the sky. Shadow starts gathering them since he thinks Black Doom knows his past and his past will come clear once he gathers all 7 Chaos Emeralds.
Black Doom does not resemble the other Black Arms aliens and neither does Shadow but Black Doom's eye shows Shadow that he has the Black Arms aliens mark on him. Black Doom doesn't appear often in person to Shadow the Hedgehog but instead sends his 3rd eye, sometimes called Dooms Eye, to give Shadow messages and tell Shadow what to do. Doing these bad deeds like killing gun soldiers, causing destruction, and such cause Shadows Chaos Blast bar to go up and when its full Shadow has infinite ammo and can do a devastating move called Chaos Blast.
Black Dooms base of operations is the black comet, a comet that comes by every few years.
 Appearances in Other Media
Black Doom also appears in the Archie Comics universe in a retelling of the Shadow the Hedgehog game.