Cleo

Cleo is one of Secret Shop pets. It is only obtainable in Secret Shop. Cleo enhances maximum level of quest. When reached 5* it gives 7* artifact: Horus's Greatsword. Maximum level of quest is not important buff, so Cleo is one of low priority Secret Shop to obtain.

Acquisition
Spirit Highlands

Unavailable in the Spirit Highlands.

Pet Shop

Unavailable in the Pet Shop.

Secret Shop

Available in the Secret Shop for the cost of 10 excessive fragments for 3 Cleo fragments.

Skill 3 - Gives 7* artifact: Horus's Greatsword
7* Artifact Horus's Greatsword is a part of a 6 piece Outland Gods Treasure set. Artifact itself gives bonus to:
 * Orc and Undead Units' Attack Power,
 * Quest Open Cost.