Storm Giant

Huge giant, chaotic good

Armor Class 16 (scale mail)

Hit Points 230 (20d12+100)

Speed 50ft., swim 50ft.

Saving Throws Str +14, Con +10, Wis +9, Cha +9

Skills Arcana +8, Athletics +14, History +8, Perception +9

Damage Resistances cold

Damage Immunities lightning, thunder

Senses passive Perception 19

Languages Common, Giant

Challenge 13 (10,000 XP)

Traits

Amphibious

The giant can breathe air and water.

Innate Spellcasting

The giant's innate spellcasting ability is Charisma (spell save DC 17). It 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

Actions

Multiattack

The giant makes two greatsword attacks.

Greatsword

Melee Weapon Attack: +14 to hit, reach 10ft., one target.
Hit: 30 (6d6+9) slashing damage.

Rock

Ranged Weapon Attack: +14 to hit, range 60/240ft., one target.
Hit: 35 (4d12+9) bludgeoning damage.

Lightning Strike (Recharge 5-6)

The giant hurls a magical lightning bolt at a point it can see within 500ft of it. Each creature within 10ft 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.