That's possible but Sandor [spoiler]was lured there and had not been staring at the portrait. I think Magda sent him to the mausoleum didn't she? Something she saw in the crystal ball. Maybe Barn was luring someone through the crystal ball?[/spoiler]
Yes, you have correcty rememberd Magda's contribution. I figure I Ching was giving Barnabas a helping hand...or wand. It probably had a soft spot for Barnabas, just like so many of us.