Ancestral Fortitude

Ancestral Fortitude is a passive talent in the Nature (Blue) tree.

In-game
This does not increase the damage reduction, but rather adds up to 40% to the actual Resistance stat, applied before other similar effects. With low levels of Resistances, it will not have much effect.

Applies to all Elemental Damage types except Physical, much like Superstition did in Diablo III.