By introducing change into the timeline.

The night of the particle accelerator explosion.

Eobard had plotted out this moment quite well. This night a fantastic meeting of many people from across timelines and groups.

In the crowd in front of him stood his former greatness enemy, besides him the ever beautiful Iris West.

Soon a two separate future versions of Barry would appear, one accompanied by tonight’s goal. Nora West-Allen.

What better way to begin making his new world than a two for one.

Here she comes now.

Iris West the latest in independent journalist invited to attend the conference and ask questions. A already less than subtle tweak of the timeline, one he used mainly as a test.

Now it was a perfect time to put his new, near godlike control of the timeline to full effect, a nudge here a tweak there and everything should come together quite well.

He turned to the fresh faced crew of journalists and journalists students, eyeing his prize quite happily as she and others rushed forward for questions.

A small slight burst of super speed started the effect, sending one report crashing into another journalist and soon the whole group feel.

One especially who landed at his feet, the rest of the group busy picking themselves up helped by others who remained standing.

It didn’t matter, his goal at hand or more correctly his feet.

“May I help you ms?” He held out his hand to who he knew to be Iris West, future wife of Barry Allen and mother to Nora West-Allen.

When she touched his hand mumbling an embarrassing thanks he didn’t hear. Nor would he for minutes as time near froze, his new powers finally ready to be used

He could see every step of Ms West life’s, in the past her mother’s issues, her fathers influence and attempts to keep her together, of Barry’s interactions.

He witnessed dozens upon dozens of possible choices, paths she take. One were she became the Flash, or her brother never met her, some she hated Barry, married a Linda Park. All snowballed into others, some he was inspired by.

Dozens upon hundreds of choices Thawne to make, ones ready to be tweaked. Still he had a goal, to meet a certain West-Allen, one he would see the full affect too.

He could choose…could choose that her father never made detective, Barry never moved in, or she went to a party ages ago,