Caustic StalkerReaching hands, a fierce and eerie visage, and a powerfully abrasive stench all stem from this hissing cloud of churning gases.Caustic Stalker CR 7Source The Emerald Spire Superdungeon pg. 153
XP 3,200
N Medium outsider (air, elemental, extraplanar)
Init +12; Senses darkvision 60 ft.; Perception +12DefenseAC 19, touch 19, flat-footed 10 (+8 Dex, +1 dodge)
hp 73 (7d10+35)
Fort +10, Ref +13, Will +4
Defensive Abilities amorphous; DR 5/—; Immune acid, elemental traits
Weaknesses vulnerable to windOffenseSpeed fly 40 ft. (perfect)
Melee 2 slams +15 (1d6 plus chemical burn)
Special Attacks breath weapon (15-ft. cone, 5d6 acid damage plus poison, Reflex DC 18 half, usable every 1d4 rounds), chemical burn (1d6, DC 18)StatisticsStr —, Dex 27, Con 20, Int 5, Wis 14, Cha 11
Base Atk +7; CMB —; CMD —
Feats Dodge, Improved Initiative, Mobility, Weapon Finesse
Skills Fly +26, Perception +12, Stealth +18
Languages Auran
SQ misty formEcologyEnvironment any underground
Organization solitary, pair, smog (3–10)
Treasure incidentalSpecial AbilitiesBreath Weapon (Su) In addition to taking acid damage, any creature harmed by a caustic stalker’s breath weapon must succeed at an additional DC 18 Fortitude saving throw or be affected by caustic creep poison.
Caustic Creep—inhaled; save Fort DC 18; frequency 1/round for 4 rounds; effect 1d4 Con; cure 2 consecutive saves. The save DC is Constitution-based.
Chemical Burn (Su) Any creature struck by the caustic stalker, or that strikes it with a natural weapon or unarmed attack, is affected as if by the burn special attack, but takes acid damage instead of fire damage. The chemical burn persists for multiple rounds, just as a normal burn, but can be ended early if the affected creature is doused in at least 1 gallon of liquid (requiring a full-round action from the victim or another creature) or fully submerges itself in water.
Misty Form (Su) A caustic stalker’s body is composed of a semisolid chemical mist similar to thick foam. The caustic stalker does not have a Strength score and cannot manipulate or wear solid objects. This form grants it the amorphous defensive ability, and enables it to move through areas as small as 1 inch in diameter with no reduction to its speed. A caustic stalker cannot enter water or other fluids, and is treated as a creature two size categories smaller than its actual size (Tiny for most caustic stalkers) for the purposes of how wind affects it.
Vulnerable to Wind (Ex) A caustic stalker takes damage every round that it’s exposed to stronger than moderate winds: 1d6 points of damage for strong winds, 2d6 points of damage for severe winds, and an additional 1d6 points of damage for each wind force category beyond severe (Pathfinder RPG Core Rulebook 439). Gust of wind is considered severe wind for this ability. A caustic stalker cannot use its breath weapon while being affected by stronger than moderate winds and for 1 minute afterward.DescriptionThough caustic stalkers arise from pockets of poisonous gas in the Plane of Air, they far prefer to congregate amid the great heat and pressure where the Plane of Earth and Plane of Fire meet. These conditions are also common in the depths of many worlds on the Material Plane. Caustic stalkers are usually content to drift amid the searing rocks and toxic fumes of volcanic depths, but occasionally emerge into more spacious areas. When they emerge, they are quick to lash out at anything that disturbs their explorations, especially if the area is windy.
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