Very good, $N.  The creatures within these containment coffers will be studied by our finest minds, and the reason behind their presence in the Undercity will be determined.$B$BIf their appearance is caused by a rift in the natural flow of magic, then we must determine if the rift was random.  If it was not random, but instead an attack by some magical force, then we must prepare for future, more serious disturbances.