Opening the initial portal is the hard part. It's possible with Karl's ability, but getting it exactly where you want it and not just within a few hundred kilometers proves exceptionally difficult.
Just being linked to the world might be enough, but as these items are so valuable, we'd rather connect directly to the store room with Lelou in it if at all possible. I don't know if a Dragon egg can hatch after a thousand years in stasis, but I've got a good feeling about this. We were originally just going to power up the bag to compensate for any extra distance, but as we're both Death Energy cultivators, adding huge amounts of Energy to make up the difference didn't seem wise with living creatures.
The portal is about one meter round, big enough to pass the incubators through without issue. At least, that's the plan.
Lelou looks super excited to see what we're hiding, as details on where we are and what we're doing were sparse.