Cyberdark Impact! [TAEV-EN054] Secret RareSet: Tactical Evolution Card type: Normal Spell Rarity: Secret Rare Return 1 each of "Cyberdark Horn", "Cyberdark Edge", and "Cyberdark Keel" from the field, hand, or Graveyard to your Deck. Special Summon 1 "Cyberdark Dragon" from your Fusion Deck. (This Special Summon is treated as a Fusion Summon.)

Set: Gladiator's Assault Card type: Effect Monster Rarity: Secret Rare Attack: 400 Defense: 300 If this card was Tribute Summoned

Collectors’ Edition Type: Sorcery Rarity: Rare Cost: {X}{B} Target player discards X cards at random

They remain paired for as long as you control both of them

−7: Target opponent loses 2 life for each creature card in their graveyard

Set: Limited Edition Beta Type: Enchantment — Aura Rarity: Rare Cost: {1}{G} Enchant creature

those who draw breath shall know the ture meaning of eternal slumber

Possibly both

(It's an aura with "When you play an attack action card or attack with a weapon

you may exert it as it attacks

Set: Sun & Moon: Black Star Promos Type: Stadium Rarity: Promo

Set: Commander 2017 Type: Artifact Rarity: Uncommon Cost: {3} Worn Powerstone enters the battlefield tapped

inflict 200 damage to your opponent for each face-up Elemental Hero monster you control