The Highlands Rise. “With the Basin’s banners down, the Highlands come for it: Boulderfist ogres and Witherbark trolls out of the hills, and the Syndicate behind them, sent by the last lord of Alterac to take it for his own.” Arathi Basin is zone 5 of 12, and its final boss is Lord Aliden Perenolde.
How to unlock Arathi Basin
Arathi Basin comes after Un’Goro Crater in the game’s zone order. The zone menu keeps a zone locked until you defeat a named final boss; in this order that is King Mosh. Surviving until that boss arrives is not enough; the menu asks for the kill. After Lord Aliden Perenolde comes Feralas. Opened zones are saved per class.
Bosses in order
| # | Boss | Base health | Arrival line |
|---|---|---|---|
| 1 | Kovork | 3,800 | “Kovork crush little ones! Basin belong to Boulderfist!” |
| 2 | Nimar the Slayer | 9,400 | “Your head will hang in Witherbark Village!” |
| 3 | Marez Cowl | 17,500 | “The Syndicate thanks you for your sacrifice.” |
| 4 | Lord Falconcrest | 29,000 | “The Basin was always Alterac’s. We are only taking it back.” |
| 5 | Lord Aliden Perenolde · final | 54,000 | “Alterac will rise again, and the Highlands will kneel to it!” |
Preparing for Arathi Basin
Lord Aliden Perenolde has 54,000 base health, against 52,500 for King Mosh. Bring the talent points you earned on the previous zones, and consider lowering enemy health in Run Options for a first clear. Classes with a death-save talent are listed in the tier list.
Questions
How do I unlock Arathi Basin?
Arathi Basin follows Un'Goro Crater in the game’s zone order, so the menu should ask for King Mosh, the final boss of Un'Goro Crater.
Who is the final boss of Arathi Basin?
Lord Aliden Perenolde, with 54,000 base health in the v0.103.1 game data.
How many bosses are in Arathi Basin?
Five: Kovork, Nimar the Slayer, Marez Cowl, Lord Falconcrest, Lord Aliden Perenolde.
Sources & scope
Zone and boss records read from the original game’s v0.103.1 (671c6f5e) WebAssembly build on 2026-10-20. The zone record holds no unlock requirement: the order is the order the game stores its 12 zones in, and the zone menu’s lock text names a final boss. In v0.91.2 each zone opened after the final boss of the zone before it; we have not checked in play that this still holds with Un’Goro Crater, Scarlet Monastery and Naxxramas added. Boss health is the base value stored in the game data. The zone, run options and level change what you meet in a run, and we have not measured them.
