From the other end of the Gate connected to Sheol, a cool breeze that carried both Ether and Origin Essence began to blow into the tunnel under the careful control of Rowan's dimensional soul.
The breeze was strong at the end of the Purgatory Gate. Still, as it blew towards the other side of the tunnel, it continuously weakened until only a minor amount of Ether and Origin Essence could be sensed at the other side.
All of this was deliberate. If Rowan wanted the transition from Aether to Ether and Primordial Essence to Origin Essence in the bodies and souls of his children to become smoother, he had to slowly introduce it to them so their adaptation would not be extremely violent, and most of them would survive this process.
There were ways that he could have done this quickly, but such methods would be needlessly cruel and lead to the death of many of his children, so following that path would be madness.
