Powerful Group of Guys [SGX1-Eens02] Common

While you control Exactly 1 "Destiny Hero" Monster (and no other monsters), and your opponent control more monsters than you, special Summon 1 "Destiny Hero" Monster from your hand or deck with a lower level than the monster you control. You can only Summon "Destiny Hero" Monsters Duration the Turn You Activate This Skill. Flip This Card About At The End Of The Turn You Activated This Skill.