Heart of Thunder

30% increased Lightning Damage
Damage Penetrates 6% Lightning Resistance [1]

Heart of Thunder is a notable passive skill that grants increased lightning damage and additional penetration against lightning resistance.

Anointment

Blight anointment to unlock the passive:

Oil #1	Oil #2	Oil #3	Outcome
Sepia Oil	Azure Oil	Golden Oil	Heart of Thunder	30% increased Lightning Damage Damage Penetrates 6% Lightning Resistance

Version	Changes
3.16.0	[Undocumented This change was not documented by any official sources. It was discovered through player testing or datamining.] Now grants 30% increased Lightning Damage (up from 25%). No longer grants 0.2% of Lightning Damage Leeched as Energy Shield.
3.6.0	Now grants 0.2% of Lightning Damage Leeched as Energy Shield.
3.3.0	Now grants Damage Penetrates 6% Lightning Resistance (up from 3%).
2.0.0	Now grants Damage Penetrates 3% Lightning Resistance (up from 2%).
1.2.0	Lightning Weaver renamed to Heart of Thunder. Heart of Thunder also grants lightning resistance penetration, but no longer grants cast speed. The area surrounding the Witch, Shadow and Ranger has been redesigned. Many values have been adjusted.