Fortunately, he still has enough time to prepare for his child's birth, his next target is the world where Sans is currently is.
For the demon world connected to Murim World, he'll just leave it to Gulli and the others, according to the information that he had obtain from the people of this world.
He knew that the demon race connected on this portal aren't that strong compared to the demon world that he had been.
It would definitely be easy for Gulli and the others to conquer this world, if they complete this mission, Gaia would have two worlds.
Not too big but definitely small, it would only get stronger and give birth to stronger children, with this, they finally would have a fighting chance against the chaos world.
Shadowslash is currently thinking of leaving this world after the preparation on the portal is finished.