| — |
| — |
 Unstoppable Force | — | — |
| Unsummon Mechanical Yeti | — | — |
 Untalent Visual Effect | — | — |
 Untamed Fury | — | 55 |
 Untamed Trapper | — | — |
 Untempered Runeblade | — | — |
| Untempered Runeblade | — | — |
 Untrackable | — | — |
| Untransform Hero | — | — |
| Unyielding Assault | — | 1 |
| Unyielding Assault | — | — |
 Unyielding Determination | — | — |
| Unyielding Determination Passive | — | — |
 Unyielding Faith | — | — |
| Unyielding Faith | — | — |
| Unyielding Will | — | — |
| Unyielding Will | — | — |
| Unyielding Will | — | — |
 Unyielding Will | — | — |
| Unyielding Will | — | — |
| Unyielding Will | — | — |
| Unyielding Will | — | — |
| Updraft | — | — |
| Upgrade Arcanite Champion | — | — |
| Upgrade Arcanite Reaper | — | — |
| Upgrade Chromatic Cloak | — | — |
| Upgrade Spellpower Goggles Xtreme Plus | — | — |
| Upgrade Zigguraut | — | — |
| Upgrade Zigguraut | — | — |
 Uppercut | — | 40 |
| Uppercut | — | 40 |
| Uppercut | — | 40 |
| Uppercut | — | 40 |
| Urok Minions Vanish | — | 1 |
 Ursine Restoration | — | — |
| Ursine Restoration Passive | — | — |
 Ursol's Command | — | 60 |
| Use Bauble | — | — |
 Use Dragon Orb | — | — |
| Use Soulstone | — | 1 |
| Use Soulstone | — | 1 |
| Use Soulstone | — | 1 |
| Use Soulstone | — | 1 |
| Use Soulstone | — | 1 |
 Using Control Console | — | — |
| Uther's Dwarf Tribute | — | — |
| Uther's Gnome Tribute | — | — |
| Uther's Human Tribute | — | — |