Homebrew
Pounce. If the panther moves at least 20 feet straight toward a creature and then hits it with a claw attack on the same turn, the target must succeed on a Strength saving throw (DC = 8 + your proficiency bonus + your Wisdom modifier) or be knocked prone. Keen Smell. The panther has advantage on Wisdom (Perception) checks that rely on smell.
Multiattack (Level 11+): The panther makes two attacks with its claws. Claw. Melee Weapon Attack: your spell attack modifier to hit, reach 5 ft., one target.Hit: 1d6 + your Wisdom modifier slashing damage. Damage increases to 2d6 at level 5, 3d6 at level 11, and 4d6 at level 17. Stealthy Ambusher (Level 5+): If the panther is hidden at the start of combat, its first attack deals an extra 1d6 damage.
Jungles, dense forests, and temperate mountain valleys.