The Underworks (CoS Zone)  

Type	Rec Level	Rec Power (Heroic)	Common Mobs	Bosses	Quests	Dungeon Objectives	Vanquish
							Common Drops	Rare Drops
The Underworks					Accessible from: Meluan's Gate
	24+		Skeleton Thrall Tombcrawler Zombie Zombie Ghoul Zombie Mutant	Brains (24)	Underworks Dock [Optional] The Works [Vanquisher] Newborn Undead [Challenge] Heroic - Newborn Undead	860 1340   Kill Brains
The Innerworks					Accessible from: The Underworks
	25+		Zombie Zombie Ghoul Zombie Hulk Zombie Mutant	Twitch (25)	Underworks Dock [Optional] The Works	890 1260   Kill Twitch
The Deepworks					Accessible from: The Innerworks
	26+		Zombie Zombie Ghoul Zombie Hulk Zombie Mutant	Xenocraft (26)	Underworks Dock [Optional] The Works	1000 1640   Kill Xenocraft
Myth Hub Connections: Meluan's Gate, The Central Bilge, Corsair Airship, The Far Scraphills, The Deepworks, Harbor Archives 4, Meluan's Rest, Railyard, Urbis Medius
Underworks Boss Raid
	26+	10897 (14988)	Zombie Zombie Ghoul Zombie Hulk Zombie Mutant	Rotwalker (26)	[Vanquisher] Newborn Undead [Challenge] Heroic - Underworks Boss Raid	Defeat Rotwalker

City of Steam Wikibase™ Zones

Each Boss Raid Challenge dungeon that you complete will grant rewards in addition to any items you find within it.

• Normal mode: Transmuter Orbs, Mastery Points, Expertise Points, Rare Materials Boxes, EXP
• Vanquish mode: EXP, Shillings, Mastery Points, Expertise Points. Note that EXP is higher than Normal mode to compensate for the loss of kill EXP that you do not get in this mode.
• Heroic mode: Rare Materials Boxes, Orange Material, Shillings