Approaching the covenant as the magi approach the edge of the cleared area around the covenant they see that there is a stone sled floating in the air about 70 yards from the parapet and its aegis.
In case it is not clear both remaining threads have now caught up with each other
I am still recovering from an incapacitating wound, otherwise I would be glad to interfere 
Justus makes haste towards the covenant to see what is going on there.