Vitreous Colossus

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Huge Giant (glass skin, glowing organs), Neutral Evil

Armor Class 17 (natural armor)

Hit Points 189 (18d12+72)

Speed 40 ft.

STR 22 (+6)

DEX 14 (+2)

CON 18 (+4)

INT 10 (+0)

WIS 12 (+1)

CHA 8 (-1)

Saving Throws Con +8, Wis +5

Skills Athletics +9, Perception +5

Senses darkvision 60 ft., passive Perception 14

Languages Common, Giant

Challenge 10 (5,900 XP) Proficiency Bonus +4

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

Magic Resistance. The creature has advantage on saving throws against spells and other magical effects.

Keen Senses. The creature has advantage on Wisdom (Perception) checks that rely on sight, hearing, or smell.

Regeneration. The creature regains 10 hit points at the start of its turn if it has at least 1 hit point.

Actions

Multiattack. The Vitreous Colossus makes two Crystal Slam attacks and one Organs Glow Pulse.

Crystal Slam. Melee weapon Attack: +9 to hit, reach 10 ft., one target. Hit: 15 (2d8+6) bludgeoning damage. A brutal crystalline punch that shatters part of the creature's glassy exterior.

Organs Glow Pulse (Recharge 5-6). From the chest, the organs glow with radiant energy. Each creature in a 15-foot radius must make a DC 15 Constitution saving throw, taking 18 (4d8) radiant damage on a failed save, or half as much on a successful one.

Legendary Actions

The creature can take 3 legendary actions, choosing from the options below. Only one legendary action can be used at a time and only at the end of another creature's turn. The creature regains spent legendary actions at the start of its turn.

Detect. The creature makes a Wisdom (Perception) check.

Crystalline Grasp. The creature makes a Crystal Slam attack.

Glow Burst (Costs 2 Actions). The giant sheds a bright glow. Each creature within 15 feet must succeed on a DC 15 Dexterity saving throw or be blinded until the end of its next turn.

Environment Mountain

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Lore & Description

Appearance

A towering giant with skin like translucent glass, veins of luminescent liquid visible beneath the surface. Its organs—heart, lungs, and other vessels—are clearly visible and glow with an inner azure light. The glow shifts with its heartbeat, casting prismatic reflections on nearby rock as it moves.

Behavior & Origins

The Vitreous Colossus guards a crystal cathedral buried beneath jagged peaks. Born when a stone giant absorbed mineral energies from a tectonic chamber, its body became a living pane of glass. It drinks mineral radiance to power the furnace-like organ within its chest, using the light to pierce the minds of intruders and reveal truths the world would rather keep shaded. Legends say the Colossus was forged to protect a fountain of luminous shards, an ancient magic capable of flooding the world with glass.

Generation Info

Original prompt:
"A glass-skinned giant whose organs are visible and glowing."

Created: Feb 2, 2026
Modified: May 31, 2026