The Grim Reaper
The Grim Reaper is a LEGENDARY pet that was hatchable from the Eerie Egg and the Cursed Egg available during the Halloween Event 2021.
The latest Pet Simulator X value list for The Grim Reaper can be found below:

Regular
💎 96,000 (96k)

Golden
💎 277,000 (277k)

Rainbow
💎 850,000 (850k)

Dark Matter
💎 2,660,000 (2.66m)