Crystal Spider Golem

Construct Nature. The golem doesn't require air, food, drink, or sleep.

Crystal Climb. The golem can climb difficult surfaces, including ceilings, without needing to make an ability check.

Immutable Form. The golem is immune to any spell or effect that would alter its form.

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

Crystal Reflection. Whenever the golem succeeds on a saving throw against a spell that targets only it, roll a d6.

• On a 1–4, the spell has no effect.
• On a 5–6, the spell is reflected back at the caster as though it originated from the golem.

Crystal Camouflage. While motionless among crystal formations, the golem has advantage on Dexterity (Stealth) checks and can appear indistinguishable from a natural crystal cluster.

Multiattack. The golem makes two Crystal Claw attacks.

Crystal Claw. Melee Weapon Attack: +10 to hit, reach 10 ft., one target. Hit: 18 (3d8 + 6) slashing damage.

Crystal Fang. Melee Weapon Attack: +10 to hit, reach 5 ft., one target. Hit: 22 (3d10 + 6) piercing damage. If the target is Large or smaller, it must succeed on a DC 17 Strength saving throw or be grappled.

Web Prism (Recharge 5-6). The spider fires a mass of crystalline webbing at a creature within 60 feet. The target must succeed on a DC 17 Dexterity saving throw or become restrained. While restrained:

• Speed becomes 0.
• Attack rolls against the target have advantage.
• The target's attack rolls have disadvantage.

A restrained creature can use its action to make a DC 17 Strength check, ending the effect on a success.

The crystalline web has an AC of 15, 20 hp, immunity to poison and psychic damage, with vulnerability to thunder damage.

Shattering Resonance (Recharge 6). The crystal spider emits a piercing harmonic shriek. Each creature within 30 feet must make a DC 17 Constitution saving throw. On a failed save, each receives 27 (6d8) Thunder damage and is Deafened until the end of its next turn. On a success the target only takes half damage.

Crystal Cocoon. One creature grappled or restrained by the spider must make a DC 17 Strength saving throw. On a failure, the target becomes restrained and is encased in rapidly growing crystal.

At the end of each of its turns, the creature can repeat the saving throw. If a creature remains cocooned for 3 consecutive rounds, the crystal hardens, reducing its speed to 0 until the cocoon is destroyed.

Razor Shards (3/day). When hit by a melee attack, the spider explodes a portion of its crystalline shell. The attacker must succeed on a DC 17 Dexterity saving throw or take 10 (3d6) slashing damage.