Hourglass of Nostradormu

Description
A "brass and glass" hourglass with white sand. It is filled with divination magic. Found in the Room of Nostradormu, which is located in the Hall of Wonders in Kazakhan Spire. Associated with Nostradormu.

Effects
Letting the sand run for 10 minutes on an altar in the headmaster's office in Kazakhan Spire transports Destiny's Children to another place and potentially another time. Letting the sand run for 10 minutes while on an excursion returns Destiny's Children to Kazakhan Spire. Days can pass on an excursion while only minutes pass in the spire.

The hourglass has a range. Anyone outside of the range does not return to the tower. Time passes differently while Destiny's Children are split between the tower and the excursion. The hourglass does not transport people who are not part of Destiny's Children to the tower.