Suspend Mana (VH)

Area
The subject area is (temporarily) a no-mana zone, dead to the flow of magic. A critical failure costs the caster a level of Magery for 2d days. At the end of that time, the caster should roll vs. IQ+Magery; any roll except a critical failure means that the lost Magery is regained – a critical failure means the loss is permanent!

Duration: The mana is restored at a rate depending on the surrounding mana level. In a low-mana zone, the area affected by the spell shrinks by one yard in radius every three days; in normal mana, by one yard every hour; in high mana or very high mana, by one yard every minute!
Base cost: 5. Cannot be maintained.
Time to cast: 10 minutes.
Prerequisites: Suspend Magic and spells from at least 10 different colleges.