Shaman · Enhancement · tier 2 · from level 15

Improved Ghost Wolf

Rank 2/2

Reduces the cast time of your Ghost Wolf spell by 3.0 sec, and Ghost Wolf may be used indoors.

Doesn't change the damage or healing of any Shaman spell.

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.