Armor Class 12
Hit Points 195 (17d12 + 85)
Speed fly 60 ft.
Saving Throws CON +10, INT +8, WIS +9, CHA +9
Skills Arcana +8, Perception +9
Damage Resistances cold, necrotic, poison, [object Object]
Damage Immunities lightning, thunder
Condition Immunities charmed, exhaustion, frightened, grappled, paralyzed, petrified, poisoned, prone, restrained
Senses passive Perception 19
Languages Common, Giant
Challenge 15
Incorporeal Movement. The spirit can move through other creatures and objects as if they were difficult terrain. The spirit takes 5 (1d10) force damage if it ends its turn inside an object.
Legendary Resistance (3/Day). If the spirit fails a saving throw, it can choose to succeed instead.
Multiattack. The spirit makes two Lightning Fist or Hailstone attacks in any combination.
Lightning Fist. Melee Weapon Attack: +12 to hit, reach 10 ft., one target. Hit: 25 (4d8 + 7) lightning damage.
Hailstone. Ranged Weapon Attack: +12 to hit, range 90/180 ft., one target. Hit: 17 (3d6 + 7) bludgeoning damage plus 7 (2d6) cold damage.
Death Bolt (Recharge 5–6). The spirit hurls a magical lightning bolt in a 120-foot line that is 10 feet wide. Each creature in that area must make a DC 18 Dexterity saving throw, taking 27 (6d8) lightning damage plus 16 (3d10) necrotic damage on a failed save, or half as much damage on a successful one. On a success or failure, an affected creature's hit point maximum is reduced by an amount equal to the necrotic damage taken. This reduction lasts until the creature finishes a long rest. The creature dies if its hit point maximum is reduced to 0.
Hailstorm (Recharge 4–6). The spirit conjures a hailstorm in a 20-foot-radius, 40-foot-high cylinder centered on a point it can see within 120 feet of itself. Each creature in that area must make a DC 17 Dexterity saving throw. On a failed save, a creature takes 10 (3d6) bludgeoning damage plus 10 (3d6) cold damage and has the prone condition. On a successful save, a creature takes half as much damage only.
Bigby Presents: Glory of the Giants, p. 184