Diabolos, King of the Abyss [FOTB-EN061] Secret Rare Duelist Saga and you take no Battle

and you take no Battle Damage from battles involving this card

Once per turn: You can discard 1 DARK monster

you can Tribute this face-up monster to destroy all face-up Attack Position monsters your opponent controls and inflict damage to your opponent equal to the combined original ATK of those destroyed monster(s)

Set: Battle Pack Tournament Prize Cards Card type: Synchro/Effect Monster Rarity: Starfoil Rare Attack: 2500 Defense: 1500 1 "Blackwing" Tuner + 1 or more non-Tuner monsters Cannot be destroyed by battle

When that monster is destroyed

Diabolos, King of the Abyss [FOTB-EN061] Secret Rare Duelist Saga and you take no BattleSet: 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.