Kiro was searching within himself, to understand more about the powers the Underworld Crystal had given him. He understood that, there were a lot of stages to unlock. Though he didn't know how to go about doing that, there wasn't exactly a manual.
His best bet was continuous use. But he was still far too weak to continously use reality warping. He also noticed that, after creating that sun, using the powers exhausted him, like the life was being sucked out of him.
He wanted more answers to what the hell was going on. So he entered another state of meditation within his metaphysical world.
'Should call this deep space or something?' He joked, hoping Lyle wouldn't disturb him.
But Lyle was a good boy, he didn't stick around and went to explore the world instead. He wanted that Underworld story no matter what, so to ensure he didn't disturb him, he went far away.