Tar-Edhel said:
I'd be curious to know what you consider a borderline case...
There are many.
What about abilities that are "natural" in a DnD context, like Tremorsense, Darkvision, All-Around Vision (Beholder), Flight (Beholder), Protection from Sonics (Destrachan), Keen Senses (Dragons), Poison Immunities, Superior Low-light Vision (Giant Owl), Amorphous, Steely Skin (Annis), Scare (Krenshar), Keen Sight (Kuo-toa), Slippery (Kuo-toa), Adhesive (Mimic), Mimic Shape (Mimic), Extract (Mind Flayer), Strands (Roper), Fire Vulnerability (Roper), Underwater Sense (Sahuagin), Freshwater Sensitivity (Sahuagin), Electricity Sense (Shocker Lizard) or dragon endurance?
(
From a list I made in June 2001, before I asked the Sage - here is the complete list and my assessment of every relevant extraordinary ability in the MM...)
These abilities are natural, and are acquired.
Some racial bonuses.
Low-light vision (example from spell description)
Scent
Improved Grab
Constrict (example from spell description)
Camouflage
Squeeze
Engulf
Blindsight
Attach
Blood Drain
Rend
Pounce
Rake (example from spell description)
Tear (Annis)
Light Blindness
Amphibious
Charge
Transparent (Gelatinous Cube)
Trip
(Stampede)
Sprint (Cheetah)
Jet (Octopus)
Keen Scent (Shark)
These abilities are natural in a "DnD context", and are acquired.
Tremorsense
Darkvision
All-Around Vision (Beholder)
Flight (Beholder)
Protection from Sonics (Destrachan)
Keen Senses (Dragons)
? Poison Immunities
Superior Low-light Vision (Giant Owl)
Amorphous
Steely Skin (Annis)
Scare (Krenshar)
? Keen Sight (Kuo-toa)
Slippery (Kuo-toa)
Adhesive (Mimic)
Mimic Shape (Mimic)
Extract (Mind Flayer)
Strands (Roper)
Fire Vulnerability (Roper)
Underwater Sense (Sahuagin)
Freshwater Sensitivity (Sahuagin)
? Electricity Sense (Shocker Lizard)
Dragon endurance
These abilities are too "extraordinary" to be considered natural, and are NOT acquired.
Moan (Cloaker)
Frightful Presence (Dragons)
Paralysis
? Most immunities
Subtypes
Regeneration
Split (Some Oozes)
Electricity Immunity (Shambling Mound)
These abilities are clearly NOT acquired.
Petrification Immunity (Cockatrice)
Spell Resistance
Water Breathing
Sound Imitation (Green Dragon)
Icewalking (White Dragon)
Spider Climb (Some Dragons)
See Invisibility (Pseudodragon)
Rust (Rust Monster)
Speak with Sharks (Sahuagin)
Special Arrows (Pixie)
These abilities depend on matter leaving the body (at which point it will return to its original form), and are NOT acquired.
Acid
Spit Acid
Web
Poison
Disease
Paralysis
Adhesive (Kuo-toa)
Stench (Troglodyte)
Ink Cloud (Octopus)
Acid Sting
Acid Spray
These abilities depend on the new forms mind (the casters retains his own mind), and are NOT acquired.
Feats
Some racial bonuses
? Rage
Ferocity
Immunity to sleep effects
? Immunity to paralysis effects
Superior Two-Weapon Fighting (Ettin)
Freeze (Gargoyle)
Rock Throwing (Giants)
Rock Catching (Giants)
Mimicry (Green hag)
Natural Cunning (Minotaur)
Guarded Thoughts (Dark Naga)