Trap
Aion thought deeply and came to a realization. He figured out that the enemy, despite having the power to control time, was still restricted in their movements. It occurred to him that the seal of those relics was holding them back.
It prevented the enemy from causing widespread chaos and altering the course of events without any control. The seal acted as a safeguard, buying him and his allies valuable time to plan and find a way to counter the enemy's temporal abilities. Only all the fragments of Tenebres could do that.
The group inside the pocket dimension should have finished things already, considering how much Aion had been punched around, so he decided to make his move.
When the speedster mechanic suddenly approached to attack Aion again, he used Teleportation and then appeared behind him while grabbing his neck and left arm. In the next moment, everyone and all the corpses inside appeared outside, and then those two disappeared.