Volatile Focus is a Sorcery 5 skill that attempts to resist focus disruptions by expending mana. This includes running, getting hit, using items, and so on. The mana expended depends on the time left and the mana cost of the spell itself. You can run while casting an Earthquake and expend a lot of mana, a medium amount of mana, a little mana, and then almost none as the time to the Earthquake going off shrinks. That illustrates how Volatile Focus works, but is probably not efficient in combat.
Resist focus disruptions
Learned from tattoo scrolls found in the Desert