Ashley learns Invigorate from the Grimoire Agilite, found in a chest at the Snowfly Forest. Invigorate is a stats-modifying spell, as casting it increases the Agility stat of the player character. The spell costs 12 MP and induces the status AGI-UP.
Its counterpart is Lead Bones, a Sorcery spell that cancels Invigorate's effect upon use. Invigorate is also removed whenever the player character exists from a room.
Invigorate is a Martial Arts ability learned by Monks at job level 2. It raises the character's physical attack by 25% for two turns. However, there is a 25% chance of failure, in which case the character will take damage equal to 20% of their maximum HP.