The Iron-Mired King
Boss · The Styx Marshes · band C, The Nine Circles

Where The Iron-Mired King waits
The Iron-Mired King holds the gates at depths 13,700, 14,000, 14,300, 14,600, 14,900, 15,200 and onward in The Styx Marshes, sharing the zone's 100-depth gate rhythm with The Sunken Fury and The Choking Sullen.
What The Iron-Mired King is
The Iron-Mired King is a Knight: it swings a sword, and the body asks for fast builds beware: the more you swing, the more it hits back — and it wards off blows from afar. As a boss it wears the type's defences at 35%, carries no status of its own, and enrages below half health: it hits harder and moves faster.
The Iron-Mired King by the numbers
The card at each gate — health, damage per swing, armour and the modifiers it rolls — straight from the game's spawn table. On the floor the boss leads with 60% of the card's health and 60% of its damage, before the road's own pressure.
What those modifiers do
CHILLING- Turns 30% of its physical damage into cold
OF DISCIPLINE- every body that steps within 4.5 tiles gains a shell of 20% of its health
MANGLING- +35% chance to cause bleeding
CORRUPTING- a third of its damage is chaos
SHOCKING- +35% shock chance; a quarter of its physical damage becomes lightning
EXPOSING- every blow cuts your resistances by 15 for 4 s
OF POWER- gains a Power charge on every hit it lands: +200% critical chance each, up to 3
EVASIVE- +22% chance to dodge your hits
PIERCING- penetrates 25% of your resistances
ARMORED- Armour ×1.9, at the cost of 5% of its health
VENOMOUS- +35% chance to poison you
OVERWHELMING- ignores 30 points of your armor
BURNING- +35% ignite chance; a quarter of its physical damage becomes fire
LUCKY- 15% of its blows land twice over
FIREPROOF- +75% fire resistance (capped at 75%)
WITHERING- every blow leaves damage over time on you: 15% of the blow each second for 4 s
Modifiers are rolled per depth and are the same for every player. Bosses always carry at least 3 and never a pace modifier (SWIFT, BRUTE), so a boss's swing rhythm is its own; of the seals only the walls — BLOODLESS, INERT, ASHEN, ETHEREAL, DENSE — ride a boss. The full list is in Enemy modifiers.
At its first gate The Iron-Mired King leads with 2,283,007,505 health, against 1,217,419,147 for the leader one floor above, and swings every 1.25s.
What a gate floor is
A gate is a floor like any other, with the boss leading its last pack. Nothing below it opens until the floor is cleared. A lost floor costs nothing; you can fight it again. How a floor is fought is under Combat.
Fight The Iron-Mired King — play free