"Butterspy", known as "Phantom Butterfly Assassin" (
The Deck’s playing style consists of using many strategies to manipulate and weaken enemy's monsters, mainly by changing their Battle Positions and decreasing the opponent's monsters stats as well as keeping your Life Points safe and maintaining field control by activating spells and traps to change the battle position either on your/opponent's turn. Another way in keeping your Life Points safe would be through Special Summoning monsters from your Deck when one is destroyed and sent to the Graveyard.
With "Moonlit Papillon" being the main searcher of the Deck, you are able to Special Summon any type of "Butterspy" monster from your Deck. "Morpho Butterspy" has its effect only activate when a monster's battle position is changed to either Attack Position or Defense Position which allows you to target that monster thus having it lose 1000 ATK or DEF which would come in very handy by activating "Enemy Controller", "Butterflyoke" and many other battle changing cards. That would give you the upper hand against monsters with high attack or defense. Also protecting your Life Points. With "Swallowtail Butterspy", you can target a monster on the field and lower its attack depending on how many Life Points you have inflicted on your opponent. To get full use of her effect, you can play "Infected Mail" which would be proven useful. But its only an option. "Blue Mountain Butterspy" serves as a "Kagetokage" for the theme, helping it to Xyz quickly into the needed Xyz Monster like "Photon Papilloperative" and "Photon Alexandra Queen".