Shaman · Elemental Combat · tier 4 · from level 25 · needs 3 points in Elemental Alacrity

Call of Thunder

+2.9 Lightning Bolt

1/1 · level 60 · per cast · and 1 more

Call of Thunder

Rank 1/1

Increases the critical strike chance of your Lightning Bolt and Chain Lightning spells by 3%.

Lightning Bolt +1.5% +2.9 Chain Lightning +1.5% +1.8

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