Refinements:

After a Charged Attack hits an opponent, a Sunfire Arrow will descend upon the opponent hit, dealing 60%/75%/90%/105%/120% ATK as DMG, and applying the Heartsearer effect to the opponent damaged by said Arrow for 10s. Opponents affected by Heartsearer take 28%/35%/42%/49%/56% more Charged Attack DMG from the wielder. A Sunfire Arrow can be triggered once every 10s.