No need for Lind's orders, the Sin Dragon already knew what to do. The rapidly expanding space barely held together, eventually stabilizing at half-human size.
"We can't hold on for long," the Sin Dragon turned his head to Lind and said, "With me guarding here, at most we can persist for over a decade, after which it will become uncontrollable even for me."
"A decade is barely enough."
In other words, Lind must succeed in ascending to the moon within that time frame, to drive out a powerful Starlet lurking up there.
However, the situation wouldn't ease even then. By that time, the unprotected Magic World would be completely exposed to other realms, like a peeled fresh egg in front of a flock of famished flies, who would swar, wrapping it up and leaving behind only maggot-filled remains.
He couldn't do it, and neither could the Undead.