Sources
CR
Type
Size
Alignment
Movement

Storm Giant Skeleton

Huge Undead, Unaligned

Armor Class 13 (armor scraps)
Hit Points 204 (24d12 + 48)
Speed 50 ft.
STR
29
+9
DEX
14
+2
CON
15
+2
INT
3
-4
WIS
8
-1
CHA
1
-5
Saving Throws STR +14, CON +7
Skills Perception +4
Damage Vulnerabilities bludgeoning
Damage Resistances cold
Damage Immunities lightning, poison, thunder
Condition Immunities Exhaustion, Poisoned
Senses darkvision 60 ft., passive Perception 14
Languages
Challenge 16 (15,000 XP)

Actions

Multiattack. The giant makes two attacks with its greatsword or hurls two rocks.

Greatsword. Melee Weapon Attack: +14 to hit, reach 10 ft., one target. Hit:30 (6d6 + 9) slashing damage plus 18 (4d8) necrotic damage.

Rock. Ranged Weapon Attack: +14 to hit, reach 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 15 Dexterity saving throw, taking 54 (12d8) lightning damage on a failed save, or half as much damage on a successful one.