| Name | Attribute | Level | Type |
|---|---|---|---|
| Unholy Flame | - | 64 | Elite Monster |
| Unholy Sprite | 55 | General Monster | |
| Unidentified Ghost | - | 1 | Interactive |
| Unidentified Ghost | - | 1 | General |
| Unknown Creature | - | 1 | General |
| Unknown Dimension | - | 1 | General |
| Unknown Dimension | - | 1 | General |
| Unknown Dimension | - | 1 | General |
| Unknown Dimension | - | 1 | General |
| Unknown Dimension | - | 1 | General |
| Unknown Dimension | - | 1 | General |
| Unknown Dimension | - | 1 | General |
| Unknown Samurai | - | 1 | General |
| Unknown Woman | - | 1 | General |
| Unknown attacker | - | 1 | General |
| Unknown treasure | - | 50 | General Monster |
| Unknown treasure | - | 50 | General Monster |
| Unmoved Box | - | 70 | Interactive |
| Unstable Energy | 63 | Boss Monster | |
| Unstable Energy | 63 | Boss Monster | |
| Unstable Energy | 73 | Boss Monster | |
| Unstable Energy | 68 | Boss Monster | |
| Unstable Energy | 63 | Boss Monster | |
| Upgrade Device | - | 1 | General |
| Urmaz | - | 1 | General |
| Urmaz | 57 | Elite Monster | |
| Use invisible creatures for bait. | - | 112 | Boss Monster |
| Use invisible creatures for bait. | - | 112 | Boss Monster |
| Valerian | - | 1 | Interactive |
| Variant Articroaker | - | 1 | General |
| Variant Cherry Blossom Spirit | 20 | Boss Monster | |
| Varok 1 Guard | - | 1 | General |
| Varok 2 Guard | - | 1 | General |
| Vendor | - | 1 | Interactive |
| Vendor 1 | - | 1 | Interactive |
| Vendor 2 | - | 1 | Interactive |
| Vendor 3 | - | 1 | Interactive |
| Vendor 4 | - | 1 | Interactive |
| Vendor Boss | - | 1 | General |
| Vendor Merchant | - | 1 | General |
| Vendor's Box | - | 1 | Interactive |
| Venomous | 82 | General Monster | |
| Venomous Bug | 52 | General Monster | |
| Venomous Reptile | 86 | Elite Monster | |
| Vermeer | - | 1 | General |
| Veteran | - | 1 | General |
| Vibrating Slate | 77 | Boss Monster | |
| Vibrating Slate | 77 | Boss Monster | |
| Vibrating Slate | 77 | Statue | |
| Vibrating Slate | 77 | Statue |