Spirit Pet

The Spirit Pet is a Pet rarely obtained after completing Catacombs Floor 4 which focuses on making you stronger while you are a Ghost. The pet is automatically spawned when the player dies

Kat Caretaking Costs
Kat can upgrade this pet to a pet if the player has an  variant of this pet. For each level the pet has, there is a 0.3% discount. For example, at level 50 there will be a 15% discount to the price listed below. Also, the cost listed is for the pet of that type to be upgraded, after which time the rarity will be that of the above type. The time listed is also in real life days as opposed to the in-game equivalent.

Trivia

 * The Epic variant of this pet damages enemies.
 * Only the Legendary variant of this pet reduces the cooldown of ghost abilities.