Descriptors
From Gempunks
Bound: The charge used to cast a bound spell cannot be recharged until the spell is no longer bound. A caster may unbind one spell they have bound as a standard action.
A creature who is currently the target of a bound spell cannot have more instances of that spell bound to them.
While the caster of the bound spell does not have the necessary gems to cast that spell, the bound spell is suppressed, and reactivates if possible when the caster has the right gems again.
Time, Joy, and Fear descriptors do not have any specific mechanical attributes.