The Master stood silently, staring at the mirror before him. He watched as the Bretheren had their happy reunion, watched as Vivi slept with all his sons snuggled up to him. The room he was in was barren of its former furnishings. The only thing left was the mirror.
The demon flew into the window, and landed behind his Master.
"They come, Master," he said.
"They're later than I expected," he responded. "How sad."
"I know the rest of your belongings are in your pocket dimension," the winged beast said, "but what of the mirror. It is your most powerful acquisition."
"I will send it away. I just wished to witness the failure of my latest plan." He tapped the glass showing the sleeping Black Mages. "Family. How ironic, that family would save him, eh, my minion?" From outside, noise of approach could be heard. The Master looked, then turned back to the mirror. "Rest well, Bretheren Arcanum. For now you have some time before I can return to resume our game. But when I do... you will feel my wrath. Until then." With a gesture, the mirror vanished from sight. Then they two went to the large window, and spread wings carried them into the night, to a second, hidden fortress in the demon's realm.
A few moments later, a force of mages, fighters, and magistrates burst through the door of the tower. They found it empty, with nothing to even indicate that there was anyone living there at any time. They scoured it from top to bottom, but found nothing of their intended prey. They didn't know where he went, and thus they had no choice but to leave empty-handed. They would post guards for a while, but there was nothing much they could do.
They could only hope his evil didn't spread too far.