Zoom landed on Earth prime the earth where all the other earth Began. He landed on Earth 1 in hopes to escape the time wraith . He used the same identity that he used on Earth 2 to trick them into believing him so he can put them at a disadvantage against him when he shows them his real self.
For 6 months he studied them examined them and learned their weaknesses . Finally he came out of hiding and confronted team flash to try and trick them into believing his lies about him being the flash in his world and trying to save everyone from zoom . After a few days they started believing him and ended up believing his lies and trusted him with their lives.
After teaching and helping them in their battles zoom came on a night were they all were vonourable and stricked and in the attack he killed his time remenant and after fierce battle with the flash Zoom won and injured flash for a very long time . When flashed was healed and regained his power and when he thought all was at peace zoom showed up and killed a person most dare to the flash ,HIS FATHER, and challenged him to a race , a race that will hold the date of all the universe .
After the funeral later on that date flash accepted the race . Team flash traped Bary inside the vault and tried to beat zoom on their own but failed and in the process lost a team member . Bary was upset to hear this and went on to save that team member and come back to fight zoom. Flash came back and battles zoom it was a fierce race and rough battle but flash came out victorious and made zoom go on his knees . Zoom underestimated flash he said he couldn't do what he needed to, and at that very moment speed wraiths appeared and flash said "I don't have to," and zoom was carried away by the speed wraiths , But before he died the speed force devil (death) took hold of his body and know is known as BLACK FLASH. From then on he was known as BLACK FLASH.
