Storm Giant

Huge giant, chaotic good
Armor Class 16 (scale mail)
Hit Points 230 (20d12 + 100)
Speed 50 ft., swim 50 ft.
STR
29 (+9)
DEX
14 (+2)
CON
20 (+5)
INT
16 (+3)
WIS
18 (+4)
CHA
18 (+4)
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 (10000 XP)

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 10 ft., one target. Hit: 30 (6d6 + 9) slashing damage.

Rock. Ranged Weapon Attack: +14 to hit, range 60/240 ft., 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 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.

Storm giants are contemplative seers that live in places far removed from mortal civilization.
Monster Manual (SRD)
  1. DnD 5e Monsters › Storm Giant
Storm Giant