Shaman · Elemental Combat · tier 2 · from level 15

Elemental Warding

Rank 3/3

Reduces damage taken from Fire, Frost, and Nature effects 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.