Blizzard has clarified some details about the Protection Paladin 4-Set and Retribution Paladin 2-Set tier set bonuses.Protection
2-Set — Glorious Purpose — Casting Shield of the Righteous increases your Block chance by 4% for 15 sec, stacking up to 3 times. 4-Set — Glorious Purpose — Blocking an attack has a 33% chance to cast Judgment at your attacker.Retribution
2-Set — Ashes to Ashes — When you benefit from Art of War, you gain Seraphim for 2 sec. 4-Set — Ashes to Ashes — Art of War has a Read more on wowhead.com