Elemental Mastery increases by 12/15/18/21/240 for 6s after triggering Swirl. Elemental Mastery increases by 96/120/144/168/192 for 9s after the wielder's Elemental Skill hits an opponent. Elemental Mastery increases by 32/40/48/56/64 for 30s after the wielder's Elemental Burst hits an opponent.