First, his past self had transcended the Ninefold Universe Tribulation, his future self was at the Destiny Realm, while he himself was only at the so-called Altar Realm. Whether he could break the seal now, travel to the myriad universes, and withstand the impact of the myriad universes with his current cultivation remained an unknown.
The Three Lives Technique took his present self as the core; his future past and future selves would inevitably vanish, remaining fixed in the past and future, and only his present self could truly leave this starry firmament.
Secondly, even if he could leave the starry firmament, what about his people?
Chapter 1018