16 (scale mail)
481 (26d20+208)
walk 50 ft., swim 50 ft.
Str +14, Con +10, Wis +8, Cha +10
Perception +17, Stealth +7
cold
lightning, thunder
Common, Draconic, Giant, Terran
23
If Iymrith fails a saving throw, she can choose to succeed instead.
Iymrith can breathe air and water.
Iymrith's innate spellcasting ability is Charisma (spell save DC 20). She can innately cast the following spells, requiring no material components: • At will: detect magic, feather fall, levitate, light • 3/Day each: control weather, water breathing
Iymrith makes two greatsword attacks.
Melee Weapon Attack: +14 to hit, reach 10 ft., one target. Hit: 30 (6d6+9) slashing damage.
Ranged Weapon Attack: +14 to hit, range 60/240 ft., one target. Hit: 35 (4d12+9) bludgeoning damage.
Iymrith hurls a magical lightning bolt at a point she can see within 500 feet of it. Each creature within 10 feet of that point must make a DC 17 Dexterity saving throw, taking 54 (12d8) lightning damage on a failed save, or half as much damage on a successful one.
Iymrith magically polymorphs into a female storm giant or back into her true form. She reverts to her true form if she dies. Any equipment she is wearing or carrying is absorbed or borne by the new form (the dragon's choice). In storm giant form, Iymrith retains her alignment, hit points, Hit Dice, ability to speak, proficiencies, Legendary Resistance, lair actions, and Intelligence, Wisdom, and Charisma scores, as well as this action. Her statistics are otherwise replaced by those of the new form.