Defeat the boss in Unearthed Halls Level 2

Defeat the landlocked boss in the Uncovered Seabed

Finish all of the post-game challenge dungeons

Defeat the boss in the Unbelievable Laboratory

Claim the Dragon Throne in the Unyielding Forge

Defeat one of the two bosses in Unfortunate Consequences

Defeat the boss in the Unsealed Mine

Defeat the waterborne boss in the Uncovered Seabed

Defeat the boss in the Kraken Lair

Train any skill to Legend rank

Leap into a volcano, I dare you.

Solve the Maze in the Unending Tower

Defeat the boss in Unstoppable Carnage

Defeat the boss in the Unyielding Forge

Solve the riddle in the Unyielding Forge

Defeat the boss in the Unending Tower

Solve the riddle on the Spiny Island beaches

Find a way to the treasure chest in the Unearthed Pit

Defeat the boss in the Unveiled Archives

Defeat one of the two bosses in Unfortunate Consequences