It creates a Boo creature token each turn, encouraging you to either grow the rodent with your plus ability or 'fling' it at the enemy with the minus
Mime, is an excellent example
There are also plenty of defense spells, such as Forbidden Chalice and Forbidden Droplet , in here that will protect your gameplan, and allow you to build up a lot of power relatively quickly
Activate "Fiendsmith Engraver" effect, shuffle "Fiendsmith's Requiem" from the GY back to the Extra Deck to Special Summon itself from the GY
Top Chase Cards to Look For: Get ready for epic pulls like the magical Mew ex Special Art Rare, dazzling Charizard ex (151 Illustration Rare), stunning Alakazam ex Secret Rare, and the beloved Pikachu Full Art
Of course I'm talking about the return of Mega Evolution in the highly anticipated Mega Evolution era and it's first expansion Phantasmal Flames