Dragon in Deception

Now another player from a different world enters the scene and this time Beelezbub observes the mind of Princess Alicia Maru, who is searching for John Lewis. She hadn't known initially that she was John's cousin and that her bloodline linked her to Arthur Pendragon and Excalibur. Alicia's magic has been activated by a dragon in her kingdom and that included getting some of the boy wizard's memory. Without telling the children he is in their minds, Beelzebub is learning many secrets such as where Arthur Pendragon disappeared to 1,000 earth years ago. This stops when the two girl cousins time-travel to the future and get AIG which they use with Excalibur to defeat some wizards in her world.

Dragon time is a strange phenomena,  because John Lewis had been missing for months and was on his own adventures, but 400 years earlier.