Frost Jötunn Elder

Frost Jötunn Elder CR: 13 (10,000 XP)

Huge jötunn, lawful evil

Armor Class: 16 (heavy hide)

Hit Points: 212 (17D12 +102)

Speed: 40 ft

STR

24 +7

DEX

13 +1

CON

22 +6

INT

13 +1

WIS

16 +3

CHA

18 +4

Saving Throws: Strength +11, Constitution +11, Wisdom +7, Charisma +10

Skills: Athletics +11, Intimidation +10, Perception +7

Damage Resistances: Force, Lightning, Poison, and Thunder

Damage Immunities: Cold

Condition Immunities: Charmed, Frightened

Senses: darkvision 60 ft., passive Perception 17

Languages: Jötun, Astari

Challenge Rating: 13 (10,000 XP)

Bloodied Berserker. If the Frost Jötunn starts its turn below half its hitpoint maximum, whenever he takes the Attack action, he has can make one additional attack with its Frozen Greataxe as part of that action.
Brutal. If the Frost Jötunn deals a critical hit, it can triple the damage die instead of doubling it.
Endurance. If the Frost Jötunn fails a Constitution saving throw against an effect that deals damage, it takes half damage and none on a success.
Giant's Might. The Frost Jötunn can deal a critical hit on a 18-20 against creatures at least one size smaller than it.
Ice Stride. The Frost Jötunn can move through icy or snowy terrain without having to make an ability check or expend additional movement.
Siege Monster. The Frost Jötunn can deal double damage to buildings and objects
Snow Sight The Frost Jötunn's vision is not obscured by heavy snowfall or fog.
Titanic Strength. The Frost Jötunn has advantage on Strength ability checks and saving throws against creatures at least one size smaller than it.
Aggressive. The Frost Jötunn can use its bonus action to move up to its movement speed towards a hostile creature that it can see within range. Frost Jötunn must end this movement closer to a hostile creature from where it started.
Innate Spellcasting. The Frost Jötunn's spellcasting ability is Charisma (Spell save DC 18, +10 to hit with spell attacks). The Frost jötunn can innately cast the following spells, requiring no material components:
At Will: Darkness, Minor Illusion, Misty Step, Ray of Frost
3/day each: Charm Person, Cone of Cold, Counterspell, Detect Magic, Dispel Magic, Enthrall, Gust of Wind, Major Image
1/day each: Cone of Cold, Freezing Sphere, Wall of Ice

Actions

Multiattack. The frost jötunn makes two attacks, either with its great club or by throwing an icy rock,
Frozen Greataxe. Melee Weapon Attack: +11 to hit, reach 5 ft., one target. Hit: 19 (3D8 + 6) bludgeoning damage plus 17 (5d6) cold damage.
Icy Rock. Ranged Weapon Attack: +11 to hit, reach 60/240 ft., one target. Hit: 28 (4D10 +6) bludgeoning damage plus 17 (5D6 +2) cold damage

Reactions

Rampage. When the Frost Jötunn reduces a creature to 0 hitpoints, it can use its reaction to move up to half its movement speed and make a Frozen Greataxe attack against a creature within range. Retaliation. If a creature hits the Frost Jötunn with a melee attack while within 10ft. of it, Frost Jötunn can make an attack with its Frozen Greataxe.