Reserve
Reserve is an attribute that reflects how many long-term spell effects you may have active upon your person at a time.
Any spell with a duration of "reserve" must take up a reserve slot on the target creature. The spell remains active a long as it occupies the slot. If it is dismissed or dispelled, the spell ends.
All PCs have six reserve slots: 3 major, and 3 minor. If a spell does not specify major or minor, assume major.