Homebrew, Ravenloft: Denizens of Darkness (3.5e)
Innate Spellcasting. The midnight cat's spellcasting ability is Charisma (spell save DC 14, +6 to spell attacks). It can innately cast the following spells, requiring no material components:
Magic Resistance. The midnight cat has advantage on saving throws against spells & other magical effects.
Claw. Melee Weapon Attack: +5 to hit, 5' reach, one target. Hit: 5 (1d4 + 3) slashing damage.
Bite. Melee Weapon Attack: +5 to hit, 5' reach, one target. Hit: 3 piercing damage.
Steal Breath. The midnight cat touches an unconcious creature & inhales that creature's breath. The creature must succeed on a DC 15 Constitution save or be cursed to have its Constitution score take a -1 penalty & be unable to be affected by any healing magic. This curse remains in place until the midnight cat is killed, the midnight cat dispels the curse, or someone casts the spell Remove Curse on the creature.
Any Climate or Terrain