Dragon Mag 330 barbarian rage variant.
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Implacable (Barbarian Variant)
*Loses Fast Movement, gains rage with DR.
Resilient Rage: Instead of normal rage bonuses, gain +4 to Dexterity, +2 to Constitution, +2 to Will Saves, and damage reduction 1/-. This temporary damage reduction stacks with the permanent damage reduction the implacable gains at higher levels.
At 11th level, the bonuses increase to +6 Dexterity, +6 Constitution, and DR 2/-. At 20th level the bonuses improve to +8 Dexterity, +8 Constitution, and DR 3/-.
This is the only rage variant that grants Dex and Con together.
Presumably this variant has the same duration and number of uses per day as regular rage.