Tian was currently upstairs with Opal's illusions, making theatre seating and a stage.
Tian made the chair frames, Opal made the cushions.
It could have all been illusionary, but they had decided that it was better if the chairs themselves were real so that they could be more easily rearranged later. Opal would be concentrating on the show, so if she made the room as one large illusion, then it would cause extra work and mana drain on her when people changed the furniture positions.
But if she just linked independent illusions to the chairs, it didn't matter if people messed with them. At worst, someone might break the spell on their own chair.
Rae used [Shadow Step] to go join them, and offered up piles of cushions, instead of using illusions. She had made thousands of them, testing theories, and she could spin up a hundred chair cushions in minutes.
