The Singularity Universe's Terror transformation allowed Zhou Wen to obtain one of the abilities of Sky-Stealing Sun-Swapping, but this ability could only be used via an exchange. He couldn't teleport the tiny planet away.
Sending one away and swapping to another planet that ended up being devoured by the Planet Devourer still allowed it to replenish its mass and be rejuvenated. This was clearly far from the outcome Zhou Wen wanted.
Is there no other way? Zhou Wen constantly gained insight into the power Singularity Universe gave him.
Zhou Wen realized that the Sky-Stealing Sun-Swapping technique didn't necessarily need a planet to be exchanged. He could exchange a planet with a paper ball. That was also possible.