Guppy's severed tail with bones showing at the end of one side.
- When combined with two other Guppy items (Dead Cat, Guppy's Head or Guppy's Paw), Isaac will turn into Guppy. He will also gain The Mulligan effect and the ability to fly.
- If used in combination with the trinket The Left Hand every chest dropped will turn into a red one instead.
- Can be found without unlocking it.