Bosses by Level

#Every boss, in order

Bosses are the richest fights in the game: each one guards uniques that drop nowhere else. This list runs from the first boss most heroes meet to the last. Levels are the boss's own level; bring a hero a few levels higher, or friends.

Level	Boss	Where	Its uniques
9	Foreman Grisk	The Old Mine, Ashenvale	Grisk's Grip, Gravecaller's Visage
11	Mother Cinderweb	Cinderweb Hollow, Ashenvale (south of the river)	Broodmother’s Locket, Silkstep Wraps, Fangspitter
15	The Ashen Warden	The Warden's Altar near Emberfall; its Echoes every fifth floor of the Ashen Depths	Emberfang, Warden's Grasp, Heart of Ashenvale
15	Vashti, the Glass Witch	The Glass Sepulchre, Sunscorch Desert	Sunlance, Mirrorglass Ward
18	The Tomb King	The Sunken Tomb, Sunscorch Desert	Crown of Sands, Headsman's Cowl
17+	Vesper, the Lantern Thief	The Ashen Depths, floors 8, 13, 18 and every fifth floor after; he levels with the floor	The Stolen Lantern, Vesper’s Veil, Gutterlight Grips
22	Gorrash the Raider Chief	Raider Hideout, Sunscorch Desert	Raider's Cleaver, Dune Whisper, Stormquiver
25	Sandmaw, the Dune Leviathan	World boss, Sunscorch Desert	See World Bosses
26	Grotmaw the Bloated	The Drowned Grotto, Mirefen Swamp	Bogtooth, Mirror of Thorns
28	Mirelash, the Three-Throated	The Drowned Belfry, Mirefen Swamp	Three-Throat Torc, Brackwater Maul, Sinkstride Greaves
31	The Rat King	The Rat King's Warren, Mirefen Swamp	Ring of the Rat King, Marshwalkers, Plaguebearer
37	Brakka, the Slag Colossus	The Slag Pits, Cinder Wastes	Slagheart Crucible, Colossus Knuckles, Slagplate
38	The Forgemaster	The Forge of Ruin, Cinder Wastes	Heart of the Forge, Worldsplitter
44	The Cinder Lord	The Obsidian Spire, Cinder Wastes	Cinderlord's Mantle, Dragonskin Carapace
47	Ashhorn the Unbroken	World boss, Cinder Wastes	See World Bosses
53	Vaelthrix, the Rime Wyrm	The Wyrm’s Roost, Rimefall Highlands	Wyrmwing Mantle, Rimebreath, Wyrmling Clutch
56	Hrimvald, the Rime Jarl	The Frozen Hearth, Rimefall Highlands	Rimeheart, Frostbite, Hoarfrost Treads
62	Skarn, the Glacier Titan	World boss, Rimefall Highlands	See World Bosses
66	The Weeping Mother	Lanternmere, the Gloamwood	Lantern of the Lost, Tearstring, Veil of Sorrows
70	The Ashen King	The The Ember Throne (three sigils)	Kingsbane, Pyre of Kings, The Ashen Sceptre, Heaven's Fall, Oathbreaker and more
72	Morrowthorn the Antlered	The Hollow Barrow, the Gloamwood	Antlers of Morrowthorn, Gloamstring, Witchlight Heart

#Only in Nightmare

Two lairs hide something worse when you enter them in Nightmare. Their bosses drop their region's sigil like any Nightmare boss, plus uniques of their own.

Level	Boss	Where	Its uniques
28 + 24	Mirelash, the Drowned God	The Drowned Belfry in Nightmare	The Drowned Choir, Tidecaller’s Crown
37 + 24	Brakka Reforged	The Slag Pits in Nightmare	Anvilbreaker, Titan’s Anvil

#The hunted: bosses with fights of their own

The newer bosses don't just slam and call for help. Each has its own tricks, listed on its page under Mechanics. Every one of them follows the same rules, so you can learn to read them:

• A ring on the ground is a warning. It fills up, then whatever it marks goes off. Step out before it fills.
• A lane of rings is a line attack (a charge, a breath, a lance of light). Step sideways out of the lane, not back along it.
• Pools stay. A ring that turns into a pool keeps hurting for a few seconds: never stand, or dodge, into one.
• Projectiles fly slowly enough to dodge. Fans come at you; rings and spirals go out in every direction, so look for the gaps and move with them.
• Wards and carapaces protect the boss. While mirrors, pillars or lanterns stand, the boss takes very little damage: break them first. A carapace soaks a share of the boss's life and heals it while it holds, so pour everything into it.
• Some bosses vanish. A boss that dives or slips into the shadows can't be hurt until it reappears, and it always shows you where with a ring.

Every trick aims at every hero in the fight, so a party spreads the pressure around, and the boss's life, its wards and its carapace all grow with the party.

#What the hunted guard

Their uniques are rare, and they come only from their own boss. Each one has its own chance per kill, the same for every hero nearby:

The exact numbers are on each boss's page. Magic Find doesn't change them.

Almost all of them do something: a web that bursts when you dodge, a dodge that turns into a blink, a lance of light every third cast, a ward that catches you when you're low, arrows that pierce while you're untouched. Several bind summons, some in twos and threes, some with auras that burn, chill or mend. See Summons and Uniques.