If a face-up card(s) you control is destroyed by an opponent's card effect: You can toss a coin and call it. If you call it right, Special Summon 1 monster from your GY. If you call it wrong, Set 1 Trap from your GY. If this card in your possession is destroyed by an opponent's card effect: You can activate 1 of these effects;
• Special Summon 1 monster from your GY.
• Set 1 Trap from your GY.
You can only use each effect of "Just Flip a Coin" once per turn.