While Lightning Shield is active, damage and multistrike damage from your Lightning Bolt and Chain Lightning spells generate an additional Lightning Shield charge, up to a maximum of 15 charges.
Your Earth Shock spell will consume any charges beyond 1, dealing their total damage to the enemy target.
Patch 6.0.2 (2014-10-14): Now causes [Elemental Blast], [Lightning Bolt], and [Chain Lightning] damage and multistrike damage to always generate an additional Lightning Shield charge, up to a maximum of 15. Earth Shock will consume any charges beyond 1, dealing their total damage to the enemy target.
Patch 5.0.4 (2012-08-28): Now a passive Elemental specialization ability learned at level 20 (was previously a 1 point tier 5 Elemental talent requiring 2 points in [Rolling Thunder]), now consumes every charge after the 1st (previously consumed every charge after the 3rd).
Hotfix (2011-07-06): "A Fulmination critical strike for more than 30,000 damage (10-player) or 45,000 damage (25-player) should now properly interrupt Rageface’s Face Rage in the Firelands."
[Lightning Shield], 
[Lightning Bolt], 
[Chain Lightning], 
[Earth Shock]
Patch 7.0.3 (2016-07-19): Removed. 
Patch 6.0.2 (2014-10-14): Now causes 
[Elemental Blast], 
Patch 5.0.4 (2012-08-28): Now a passive Elemental specialization ability learned at level 20 (was previously a 1 point tier 5 Elemental talent requiring 2 points in 
[Rolling Thunder]), now consumes every charge after the 1st (previously consumed every charge after the 3rd). 
Hotfix (2011-07-06): "A Fulmination critical strike for more than 30,000 damage (10-player) or 45,000 damage (25-player) should now properly interrupt Rageface’s Face Rage in the Firelands." 
