Fantasy Monster: Clockwork Volcano

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Clockwork Volcano

A big, hot, metal cone-shaped contraption on small mechanical legs, spewing acrid smoke and drops of molten stone around.

CR 5; XP 1,600
N Large Construct (clockwork)

Init +4; Senses darkvision 60 ft., low-light vision; Perception +0

Defense
AC 18, touch 11, flat-footed 16 (+2 dodge, +7 natural, –1 size)
hp 63 (6d10+30)
Fort +1; Ref +3; Will +1

Weakness vulnerable to acid

Offense
Speed 10 ft.

Melee 2 slams +10 (1d8+5)

Space 10 ft.; Reach 5 ft.

Special Attacks ballistic barrage, eruption (20-ft. burst, DC 15, 6d6 fire and bludgeoning)

Statistics
Str 20, Dex 10, Con —, Int —, Wis 11, Cha 1
Base Atk +6; CMB +12; CMD 22 (28 vs. trip)

Feats Improved Initiative^B, Lightning Reflexes^B

Skills Perception +0, Stealth +0

SQ refill, winding

Ecology
Environment urban, ruins
Organization solitary or battery (2–6)
Treasure standard

Special Abilities

Ballistic Barrage (Ex) Under the supervision of a character with Siege Engineer feat, a clockwork volcano can take 2d4 full-round actions of preparation before firing as an indirect-fire siege weapon, using the supervisor's attack bonus for targeting, with range increment of 200 feet. If the supervisor has Master Siege Engineer feat, the preparation time can be reduced to 1d4+1 rounds.

Eruption (Su) A clockwork volcano can spew a ball of molten stone targeting single intersection within 100 feet. The attack deviates 1d6 ×5 feet in the random direction from the intended point, like a missed splash weapon, dealing 6d6 points of bludgeoning and fire damage within 20 feet burst (a successful DC 15 Reflex saving throw halves the damage). It takes 1d4+1 rounds for the clockwork volcano to reset this attack after using. The saving throw DC is Constitution-based and includes +2 racial bonus.

Refill (Ex) A clockwork volcano that shuts down for too long might needs an occasional refill of alchemical ingredients, worth at least 1,000 gp, unless it is regularly wound up and prevented from extended period of inaction that would make its alchemical oven go cold.

Clockwork volcanos are experimental siege weaponry, capable of moving and limited operations of their own, though they still can't really function as a long-range weapon without supervision. When not fighting, clockwork volcanos can be sometimes seen grinding and consuming stones and grit, likely refilling their supply of molten stone.

Constructing Clockwork Volcano

The creator has to start with a metal frame fitted with clockwork mechanisms and repurposed alchemical laboratory costing 2,000 gp.

CL 12th; Price 14,000 gp

Requirements Craft Construct, fireball or flame strike, geas/quest, stone shape, creator must be at least caster level 12th; Skill Craft (clockwork) DC 25; Cost 8,000 gp