Shaman · Enhancement · tier 4 · from level 25

Toughness

Rank 5/5

Increases your Stamina by 10%.

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.