Gemini Summoner (LDK2-ENJ17) - Legendary Decks II Unlimited

Once per turn, during your opponent's End Phase, you can pay 500 Life Points to Normal Summon or Set 1 Gemini monster from your hand, or Normal Summon 1 face-up Gemini monster you control. Once per turn, if this card would be destroyed by battle, it is not destroyed.