I believe the embolden parts make Crag Cats too much for a Ranger to have as animal companion.
I think the impression NWN gives of Crag Cats is a bit less than what they are, so since its topical and I knew where to grab the stats from:
CRAG CAT
Medium-sized Magical Beast
Hit Dice: 2d10+6 (17 hp)
Initiative: +4 (Dex)
Speed: 40 ft., climb 40 ft.
AC: 17 (+4 Dex, +3 natural), touch 14, flat-footed 13
Attacks: 2 claws +8 melee, bite +6 melee
Damage: Claw 1d4+6, bite 1d4+6
Face/Reach: 5 ft. by 5 ft./5 ft.
Special Attacks: Pounce, rake 1d4+6
Special Qualities: Nondetection, spell turning, leap, slow fall
Saves: Fort +6, Ref +7, Will +1
Abilities: Str 22, Dex 18, Con 16, Int 12, Wis 12, Cha 6
Skills: Balance +7, Climb +18, Hide +7, Jump +20, Listen +5, Move Silently +7, Spot +5
Feats: Multiattack, Skill Focus (Jump)
Climate/Terrain: Temperate and cold hills and mountains
Organization: Solitary or pack (3-6)
Challenge Rating: 3
Treasure: None
Alignment: Always neutral
Advancement: 3-4 HD (Large)
The fabled Hunter-of-Man is a many-fanged, sure-footed predator of the North. It may be found anywhere except deep
forest, but prefers the rock ledges and cliffs of the high country near the mountains. Its cry sounds like a sudden, human
scream of terror. It also often causes such sounds from its victims as it hunts, for it prefers human flesh to all other prey.
Though these cats are usually solitary hunters, they avoid fighting each other, and may be found in family groups of two
parents and 1d4 cubs in spring, or in hungry packs of 1d4+2 adults in severe winter weather. Cubs are half strength and
lack the pounce and leap special abilities.
COMBAT
A crag cat is an intelligent hunter who knows its territory well. A crag cat usually stalks and traps its prey, avoiding
counterattacks and ambushes. It often attacks when prey is asleep, exhausted, or otherwise weakened.
Pounce (Ex): A favorite attack form is the pounce from above. This is the only time the crag cat can use its rear
paws in combat (which have the same Attack and Damage characteristics as the front paws) as well as its front paws.
Rake (Ex): A crag cat that pounces on an opponent can make two rake attacks (+8 melee) with its hind legs for
1d4+6 damage each.
Nondetection (Sp): A crag cat can’t be detected or traced by magic, though many folk say they can “feel” when one
is near or watching. A crag cat is cloaked in a permanent aura of nondetection (caster level equal to the crag cat’s Hit Dice).
Spell Turning (Sp): A crag cat is cloaked in a permanent aura of spell turning (caster level equal to the crag cat’s Hit
Dice). Enchantments act as feeblemind spells if turned.
Leap (Ex): A crag cat has no limit on how far he can jump. Additional distance for Jump checks is doubled.
Slow Fall (Ex): A crag cat takes damage from a fall as if it were 120 feet shorter than it actually is.
Skills: A crag cat receives a +8 racial bonus to Jump checks.
