Diabolos, King of the Abyss [FOTB-EN061] Secret Rare Thunder or if this card in

or if this card in your possession is destroyed by an opponent's card effect and sent to your Graveyard: You can Special Summon 1 "Gaia The Fierce Knight" monster from your hand

and destroy that card

Set: Ancient Prophecy Card type: Fusion/Effect Monster Rarity: Secret Rare Attack: 0 Defense: 0 "Uria

If it was a Trap Card

When the equipped monster destroys a monster by battle and sends it to the Graveyard

Diabolos, King of the Abyss [FOTB-EN061] Secret Rare Thunder or if this card inSet: Force of the Breaker Card type: Effect Monster Rarity: Secret Rare Attack: 2800 Defense: 1000 This card cannot be Special Summoned. If you Tribute Summon this card, the Tributes must be DARK. This card cannot be Tributed by a card's effect. During your opponent's Draw Phase, before their draw, look at the top card of their Deck, then put that card on the top or the bottom of their Deck.