Shaman · Elemental Combat · tier 3 · from level 20

Elemental Alacrity

+21.5 Lava Burst

3/3 · level 60 · per second of casting · and 2 more

Elemental Alacrity 123

Rank 3/3

Reduces the cast time of your Lightning Bolt, Chain Lightning, and Lava Burst spells by 0.50 sec.

Lava Burst +25.0% +21.5 Chain Lightning +33.3% +20.6 Lightning Bolt +25.0% +19.6

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.