🐾 Headless Horseman Pet in Grow a Garden — Prismatic
Headless Horseman is a Prismatic pet from the 2025 Halloween Event and the rarest hatch in the Spooky Egg (0.5%). Per the wiki it was the first pet to apply mutations to pets, and the third Prismatic pet after the Kitsune and Corrupted Kitsune.
Last verified against the Headless Horseman page and the ability data on the Grow a Garden wiki.
Spooky Egg, 0.5% (1 in 200).
📋 Headless Horseman at a glance
| Rarity | Prismatic |
|---|---|
| How to get | Spooky Egg (0.5%). The egg cost 30 Candy Corn or 149 Robux |
| Hunger | 77,777 |
| Ability (wiki wording) | The Reins of Ruin: Occasionally haunts a random level 50 pet without a mutation, resetting it to level 1 and bestowing one of four chaotic mutations: Dreadbound, Soulflame, Spectral, or a rare chance for Nightmare! |
| Added | October 11, 2025 (Halloween Event 2025) |
| Still obtainable? | No, per the wiki |
⚡ What The Reins of Ruin does
Every 40 minutes 44 seconds at base weight, the Headless Horseman haunts a random pet that is level 50 and has no pet mutation. That pet drops back to level 1 and gets one of four pet mutations: Dreadbound, Soulflame or Spectral, or Nightmare with a 6% chance.
It works like a free trip to the Pet Mutation Machine, which also needs level 50 and resets the pet, but limited to these four mutations.
It's based on Roblox's own Headless Horseman bundle.
📈 Headless Horseman stats by weight
| Pet weight | Cooldown | Required pet level | Nightmare chance |
|---|---|---|---|
| 10 kg | 36:44 | 45.5 | 7% |
| 25 kg | 30:44 | 38 | 8.5% |
| 41 kg | 24:20 | 30 | 10.1% |
| 60 kg | 16:44 | 30 | 12% |
Weight lowers the level it needs: from 50 down to 30 by about 41 kg, so younger pets qualify. The Nightmare chance doubles to 12% at 60 kg, and the cooldown falls 24 seconds per kilogram to 16 minutes 40 seconds at about 60 kg.
🎃 Using it safely
Any eligible pet can be picked, so keep pets you don't want reset away from the level it targets, or give them a mutation first.
⚡ See Headless Horseman's ability at your pet's weight →
❓ FAQ
What does the Headless Horseman do in Grow a Garden?
Every 40:44 at base weight, it resets a random un-mutated level 50 pet (level 30 once the Horseman is about 41 kg) to level 1 and gives it Dreadbound, Soulflame, Spectral, or Nightmare at a 6% to 12% chance.
Which pets can the Headless Horseman target?
Pets at the required level (50, falling to 30 with weight) that don't already have a pet mutation.
How do you get a Headless Horseman?
It hatched from the Spooky Egg with a 0.5% chance during the 2025 Halloween Event.