Return 1 Level 5 or higher Dragon-Type monster you control to the hand, and if you do, destroy all Spell and Trap Cards on the field.
Rulings
Netrep Rulings
Monsters that are changed to Dragon-Type by an effect are eligible to be targeted by “A Wingbeat of Giant Dragon.”
Fusion monsters returned to the hand by the effect of “A Wingbeat of Giant Dragon” are returned to the Fusion Deck.
If the only eligible Dragon-Type monster is removed from the field before “A Wingbeat of Giant Dragon” resolves, the effect of “A Wingbeat of Giant Dragon” disappears.
“A Wingbeat of Giant Dragon” targets the monster it returns to the hand. The 'return one Level 5 or higher Dragon-Type' is not a cost of activation.
“A Wingbeat of a Giant Dragon” may not be activated while “Lord of D.” is active on the field.