Shaman · spell

Lightning Shield

174per cast

Rank 7 · level 60 · before talents

Lightning Shield

370 Mana

Instant

The caster is surrounded by 3 balls of lightning. When a spell, melee or ranged attack hits the caster, the attacker will be struck for 178 Nature damage. This expends one lightning ball. Only one ball will fire every few seconds. Lasts 10 min.

Talents that change it, each at full ranks:

Improved Lightning Shield +26.1 Mental Quickness +7.0 Tidal Focus +5.4 Thundering Strikes +4.3 Tidal Mastery +4.3 Elemental Fury +3.2 Ancestral Knowledge +0.1 Shamanistic Focus per 100 mana +38.5

Averages, counting crits and misses, with a typical weapon and no other gear or buffs, against a target your level. Talents at level 60. Worked out from the game's own data, the same way as the Foresight addon.