Sweet, thanks!
First off, I think we should rename it The Creature of Havenmere ("Demon")
DR 10/X?
Environment: Unknown Alternate Material Plane?
Assuming those skill ranks...
Balance +7, Climb +23, Concentration +14, Jump +12, Listen +17, Spot +11, Survival +11
Add these from earlier:
Acidic Saliva (Ex): The "demon"'s bite is extremely acidic and highly toxic. Anyone bitten by the "demon" must make a DC 24 Fortitude save or take an additional 3d8 points of acid damage. The save DC is Constitution-based.
Caustic Sweat (Ex): A "demon" that performs a stressful activity, such as combat or carrying a heavy load for at least two rounds, begins to sweat. This perspiration is strongly acidic, dealing 1d4 points of acid damage to any creature that touches the "demon" with a natural attack or unarmed strike. The "demon" also deals this acid damage each round to a grappled opponent. The sweat usually lingers for the duration of the stressful activity, and for a number of rounds equal to the "demon"'s Constitution modifier after the activity ended.
The creature's sweat has a bitter reek, and is considered an overpowering scent, meaning the "demon" can be detected at triple normal range by creature's with the scent ability.