Rune Spirit

Description
The Rune Spirit only exists as a pet and can have a few different appearances:
 * Green sphere with six rotating stones.
 * Chubby ghost with green sphere as a belly.

Pet Merging
The Rune Spirit is always of a 'None' elemental type.

Rune Ghost as Agent
Functioning as a agent the Rune Spirit can only be merged with other Rune Pets.

Rune Ghost as Re-Agent
Functioning as a re-agent the Rune Spirit can be merged into all other types of pet.