Jötunn

Huge giant (shapechanger), Chaotic Neutral

Armor Class 16 (natural armor)

Hit Points 150 (13d12 + 65)

Speed 40 ft., Swim 40 ft.

STR 22 (+6) · DEX 14 (+2) · CON 20 (+5) · INT 16 (+3) · WIS 18 (+4) · CHA 15 (+2)

Skills Arcana +7, Deception +6, History +7, Nature +7, Perception +8

Gear Rune-carved greataxe

Senses Darkvision 120 ft., passive Perception 18

Languages Giant, Common, Primordial

Challenge 12 (8,400 XP)

Traits

Amphibious. The jötunn can breathe air and water.

Legendary Resistance (3/Day). If the jötunn fails a saving throw, it can choose to succeed instead.

Chthonic Nature. The jötunn ignores difficult terrain created by ice, snow, earth, or rubble.

Actions

Multiattack. The jötunn makes three Glacial Greataxe attacks or two Rune-Carved Boulder attacks. It can replace one attack with Spellcasting.

Glacial Greataxe (Melee Attack). +10 to hit, reach 10 ft., one target. Hit: 17 (2d10 + 6) slashing damage plus 4 (1d8) cold damage, and if the target is Large or smaller, it is automatically knocked Prone.

Rune-Carved Boulder (Ranged Attack). +10 to hit, range 60/240 ft., one target. Hit: 28 (4d10 + 6) bludgeoning damage.

Spellcasting. The jötunn casts one of the following spells, requiring no material components and using Wisdom as the spellcasting ability (spell save DC 16):

At Will: Fog Cloud (PHB, p. 276), Minor Illusion (PHB, p. 298)

2/Day each: Dispel Magic (PHB, p. 264), Polymorph (self only; PHB, p. 306)

1/Day each: Cone of Cold (PHB, p. 253), Earthquake (PHB, p. 267)

Bonus Actions

Primeval Shift. The jötunn taps into its ancient shapeshifting heritage. It can change its size to Large or Gargantuan, or return to its true Huge size. While Gargantuan, its melee attacks deal an extra 4 (1d8) damage. While Large, its walking speed increases by 10 feet. Additionally, it can choose to manifest a single animalistic trait, gaining either a flying speed of 40 feet or a burrowing speed of 40 feet until it uses this bonus action again.

Lore

Mighty giants, chthonic enemies of gods and humans.

The jötnar, or frost giants, are ancient and powerful beings from Norse myth. They embody untamed wilderness and primeval magic, and they were around long before the gods came to rule the world.

Everything began in the great void where ice and fire collided, giving birth to the first giant, Ymir. His children appeared in strange ways: a man and a woman sprouted from under his arm, and a six-headed giant arose when his feet rubbed together. When the young gods killed Ymir, almost his entire race drowned in a deluge of his blood. Only Bergelmir and his wife survived, becoming the forebears of the new generation of giants—the jötnar. Gods and giants fell in love so often and had so many children together that it’s sometimes hard to tell where the "monster" ends and the "god" begins.

From Grimm Legends Bestiary 5E, p. 38 · Fern Flower Press