Adrian immediately returned back to Avalon when he could as he did not want to get caught in something troublesome regarding the angels, devils or Nephilim. He already gained the attention of the devils of Hell. He does not want any more attention that can drag him if a war between them.
Adrian thought that he would be out of any sort of problem, but he forgot about one thing. Anything that cannot be done by a greater demon, but the Arch Demon Elders cannot do would be his chore. As soon as he landed on Avalon's soil, a rift appeared below his feet.
Adrian has already prepared for cases like this because this did not happen just once. He immediately stabilized the rift as he used his cloak to levitate before releasing his wings to push him upward. Just as he practiced, he was not caught inside the rift.