Hmm...i guess i would write the story weekly after i watch Dragon ball super in the process so i could also know Black's backstory,So let's go to chapter 3...
Black Chaos
Chapter 3
In the rocky terrain of the wasteland a purple crack in the sky appeared,Black appeared to the scene confused "Where am i?"Black thought to himself,He tried to sense Trunks ki and he sensed that he was flying to West city home of the Capsule Corporation,He concluded he must Be searching for life and then he sensed the whole earth and suddenly he sensed the humans were still alive and he could sense many much stronger ki than in his earth but not nearly as strong as he is and trunks except maybe one"Son Goku"Black sensed that he was still alive in this world and he wanted a challenge other than trunks to fight and then he wanted to fight his counterpart so he skyrocketed to the location of son goku,His aura flaring as he laughed maniacally to the idea of fighting the famed son goku along with killing trunks...
In mid flight trunks suddenly sensed the dark ki headed towards him and suddenly panicked and immideatly turned into a Super Saiyan and raised his speed to capsule corporation before it's too late,The sudden Ki increase surprised every z fighter and woke them from their sleep including Goku,As they felt the energy coming to capsule corporation they also went there to check the condition,When all of the z fighters arrived they saw a stranger with blue hair rushing towards them when suddenly he landed in front of goku.''Goku,I need your help right now"Trunks spoke suddenly and goku replied seriously"Who are you?"Trunks was surpised by this and before he could say anything else Black came soaring through the skies ready to Find where trunks is when black found all the z fighters in one place and he whispered to himself"Son Goku..."As he watched all the other z fighters he grinned maliciously preparing to kill them all but before he could do it he saw trunks immideatly changing into super saiyan 2 and rushing towards him with sword in his hand but easy at it is he deflected the sword and punched trunks in the gut hard enough to daze him and knock him down with a roundhouse kick,While this was all happening the z fighters stood awed mostly goku and vegeta for different reasons,Goku because someone else than him achieved the super saiyan transformation and vegeta for being surpassed by yet a stranger to the super saiyan transformation then suddenly without warning black punched goku right in the face with full strength nearly knocking him out and then suddenly black smiled darkly"This is gonna be fun.."
Sorry for not updating earlier,I really wanted to upload this but i was only done halfway and i was a bit relunctant to write the story because i don't know black's power for sure like when black was sucked back into the portal was an important plot point but i have some time before goku fights Zamasu so enjoy this for a while..