Isserath, Elder of the Frost Wyrms

Level 100 Dragon Ice Boss Superboss

Isserath was old when Hrimgaul was an egg, and Hrimgaul was her least child. She sleeps curled about the long winter in the Frozen Wastes, and her breath is the snow-wind that comes down from the north each year. The wardens of Isselhold set a watch upon her once. The watch is still there, very cold, very still.

Stats

Level: 100 (data base level 100; monsters are rescaled to the level of the spawner they come from)
Hit points: 416,000 at level 100
Damage: 60–104 per hit (×6.52 in combat before your armour: ≈ 391–678)
Damage type: Ice
Armor class (defence): 180 (blocks that share of your weapon damage: AC / (AC + 100 + 8 × your level), max 60%; spells ignore AC)
Accuracy (hit): 125 (its chance to hit you = 80% + 1% × (accuracy − your AC), 10–95%)
Attack speed: one attack every 1.6 s
Move speed: 40 (game units; higher is faster)
XP when killed: 150,000 at level 100
Element: Ice
Family: Dragon

Stats by spawn level

Level	HP	Damage	Hit (×combat mult)	AC	Accuracy	XP
100	416,000	60–104	391–678	180	125	150,000

Resistances & weaknesses

Fire	Ice	Poison	Earth	Storm	Holy	Dark
takes +50%	−25% damage	normal	normal	normal	normal	normal

Derived exactly as the game does (elemental_mult): same element ×0.75, opposite element ×1.5, Void creatures ×0.8 to everything. Physical damage is reduced by AC instead.

Abilities

Ice creature
Its blows deal ice damage
Hard enrage after 600 s of combat (×3 damage, ×1.4 speed, attacks ×2 as often)
Breath: Ice breath (range 5, ×1.5 damage), every 8s
Rifts: 4 marked patches (radius 1) erupt around you after a 1.4s warning, ×1.3 ice damage, every 9s
Knockback: knockback (range 2, 4 cells) after a 1s warning, ×0.6 damage, every 13s
Below 66% HP – "Isserath rises into the snow-wind and breathes the long winter.":
Sweeping beam (8 tiles long, 120° arc over 2.4s), ×0.5 ice damage, every 13s
Hazard pools: 4 pools (radius 7) on the ground, 4% of your max HP per second of magic damage, after a 2s warning, every 1s
Below 33% HP – "The Elder calls its kin out of the ice.":
Summons waves of Ice Elemental, Frost Wolf (2 each, up to 4 alive), every 35s
Rifts: 5 marked patches (radius 1) erupt around you after a 1.4s warning, ×1.3 ice damage, every 7s
Pull: pull (range 9, 5 cells) after a 1.1s warning, ×0.4 damage, every 15s
Enrage: enrages below 100% HP (×1.3 damage, ×1.2 speed)
Takes +50% damage from fire attacks, −25% from ice

Where to find it

Frozen Wastes (L100–100)

Superboss: roams/sleeps at (1000, 127) in Frozen Wastes – Asleep under the snow of the Frozen Wastes, curled about a hoard of ice.; respawns every 90 minutes.
Appears via lair.

Drops

Drop	Chance per kill	Rarity / type	Notes
Gold	100%	Currency	6000-12000
Isserath's Fang	100%	Unique
Supreme Health Potion	100%	Common	x3-5
Frostbrand	5.0%	Unique
The Glacier Crown	5.0%	Unique
Fang of Platino	5.0%	Unique
Gravecaller	5.0%	Unique
Stormstring	5.0%	Unique
Aegis of the Tide	5.0%	Unique
Crown of Sundmark	5.0%	Unique
Band of Eternity	5.0%	Unique
Sundrax's Scale	3.0%	Unique
Heartwood of Ath-Thorn	3.0%	Unique
Durhask's Tooth	3.0%	Unique
Ulmere's Hex-Ring	3.0%	Unique
Raxathor's Knuckle	3.0%	Unique
The Eye of Vaelsund	3.0%	Unique
Kaelith's Crown	3.0%	Unique
Ice Dragon Scale	100%	Common	x6-10
Equipment (random base, tier and quality)	100%	Normal / Magic / Rare / Legendary	better quality +2; odds per piece: Normal 70%, Magic 22%, Rare 7.0%, Legendary 1%
Spell Tome (random spell, tier up to its level)	100%	Tome
Any Unique item (a random unique, from any monster)	0.10%	Unique

Loot table superboss_frost_wyrm: 1 roll per kill. Equipment tier follows monster level (level 100 → tier 9, Voidsteel; ±1 tier 10% of the time). Champions roll one extra gear roll with ×4 gear chance. Chances are the in-game Bestiary rates (Bestiary.drop_table); set pieces and uniques are the global 1% / 0.10% rates.

Quests

No quest asks you to hunt this creature.