Vernusylph and the Changing Season (POTE-EN074) [Power of the Elements]

Target 1 "Vernusylph" monster in your GY; add it to your hand or Special Summon it. During your opponent's turn, except the turn this card was sent to the GY, if you have no cards in your hand: You can banish this card from your GY; Special Summon as many "Vernusylph" monsters as possible with different names from your GY, but return them to the hand during your End Phase. You can only use each effect of "Vernusylph and the Changing Season" once per turn.