9 lives: The Abyssal Panther has 2d8+1 lives. They come back to life if slain, after three days have passed, where they were when they were slain. If they would come back to life in a place that would kill them, (lava, acid pools, etc.) they are teleported to nearest safe place. If all lives are spent, but they are brought back to true life using Necromancy, then they re-roll the amount of lives that they have. (This resets so that if they are brought back to life by, say Resurrection the DM rolls 2d8+1 and they get 2d8+1 lives.)

All things are cured after coming back to life, diseases, curses, lost body parts etc.

Claw: +4 to hit, reach 5 ft., 1 target. Hit: 11 (2d8 + 1) slashing damage. +2 fire damage. 

Fire-breath: +7 to hit, range 5/40 ft., 15 ft. cone. Hit: 26 (4d12 + 2) fire damage. If the fire-breath doesn't hit the target(s) still take half damage. Recharges after short rest.

Hellish Rebuke: 2d8 fire damage.