| Name | Category | Classes | Levels |
| Undying Belief | Vengeance | Priest of Mitra | 60 |
| Undying Glory of Xotli | Possession | Herald of Xotli | 30 |
| Unholy Armor | Corruption | Assassin | 40 |
| Unholy Fortitude | Reanimation | Necromancer | 25 |
| Unholy Hate | Conflagration | Demonologist | 25 |
| Unholy Inspiration | Nightfall | Necromancer | 25 |
| Unholy Power | Reanimation | Necromancer | 15 |
| Unholy Soul | Corruption | Assassin | 40 |
| Unholy Strength | Depravity | Dark Templar | 60 |
| Unholy Strength (Assassin) | Corruption | Assassin | 20 |
| Unleashed Power | General | Demonologist, Herald of Xotli, Necromancer | 25 |
| Unnatural Dexterity | Reanimation | Necromancer | 30 |
| Unstable Mind | Berserker | Barbarian | |
| Unstoppable | Reaver | Barbarian | |
| Unstoppable Berserker | Reaver | Barbarian | |
| Untamed Energy | Spirits | Bear Shaman | 40 |
| Untamed Regeneration | Wrath | Bear Shaman | 20 |
| Unyielding Faith | Divinity | Priest of Mitra | 50 |
| Ursine Onslaught | Wrath | Bear Shaman | 15 |
| Ursine Roar | Wrath | Bear Shaman | 30 |
| Ursine Rush | Wrath | Bear Shaman | |
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