rare ne large beast 

Perception +14

Skills Acrobatics +15, Athletics +14, Stealth +13

Str +4 Dex +5 Con +3 Int -4 Wis +2 Cha +0

Disharmonious Decay (poison) When a spawn dies, its foulness seeps into the land in a 100-foot radius. Non-magical plant life in the area decays within 1 hour, and new non-magical growth can't sprout for 1 month. A creature can act on the spawn's corpse within 1 minute of its death to limit this decay to a 10-foot square by succeeding at a DC 22 Medicine, Nature, or Occultism check.

AC  24; Fort +13, Ref +17, Will +10

HP 70, regeneration 10 (deactivated by good); Immunities acid

Speed 40 feet, burrow 25 feet

Melee [>] mandibles +17 (finesse, versatile s), Damage 2d10+7 piercing

Melee [>] wing shard +17 (agile, finesse), Damage 1d6+7 piercing plus 1d6 sonic

Ranged [>] putrid spit +17 (range increment 60 feet), Damage 2d8+4 acid

Fusing Spit [>>] (acid) The spawn retches up thick, caustic sludge and spits it at a creature within 60 feet, causing equipment and flesh to melt and partially fuse together. The creature must succeed at a DC 23 Reflex save or be clumsy 2 for 1 minute.

LOMM, page 53.