Kothar summoned a portal directly in front of himself, and then another within the center of the vertical tunnel. He stepped back, and ran into the portal, for he would need to ensure he had enough vertical momentum to be able to reach the rungs on the side of the tunnel.
Kothar ran forward, phasing through the portal, almost slamming into the side of the tunnel, just managing to break his sideways fall by quickly grabbing at the rungs that grew out of the gray wall like natural extensions of it.
But from here on, things would be even more difficult, since Kothar was within the narrow vertical tunnel, his body would want to fall back down toward the ground, so he would have to have enough horizontal momentum to prevent himself from falling into the portal as he passed through, losing parts of his body to the void.
