Activities
Kurast Undercity
A timed dungeon where Tributes pick the reward.
Unlocking it
The Undercity needs Vessel of Hatred. Reach level 20 and find the Spirit Flame in Nahantu to open the portal. Once one character has done it, the rest can enter from level 1.
A run
There are three floors and then a boss. The timer starts at 150 seconds and is shared across the whole run. Each new floor adds 30 seconds to it. Each floor starts in a white safe circle, and the clock only runs once you step out of it. The boss fight is untimed. A Tribute can lower the starting time.
District bosses
Attunement, Tributes and Bargains
Attunement is earned by killing as you go, and its rank when the boss dies sets the quality of the reward. A Tribute works like a key: it makes the run harder in some way and aims the loot at something specific. Using a Tribute also lets you add a Bargain, which narrows the reward further for a material cost. You can enter without a Tribute, but the rewards are weaker.
Season 15
The Undercity is one of the two reputation activities for the Splinter of Destruction, along with Lair Bosses.