Undermine [Invasion] 121 send the top 2 cards

send the top 2 cards of your Deck to the Graveyard

and creatures in the Mortal Realms and the 41st Millennium

Set: Legendary Collection 3: Yugi's World Card type: Normal Trap Rarity: Secret Rare When an opponent's monster declares an attack: Destroy all Attack Position monsters your opponent controls

Set: Black & White: Plasma Freeze Type: Lightning Rarity: Ultra Rare Retreat cost: Colorless

You can only use this effect of "Harpie Channeler" once per turn

Undermine [Invasion] 121 send the top 2 cardsSet: Invasion Type: Instant Rarity: Rare Cost: {U}{U}{B} Counter target spell. Its controller loses 3 life. "Which would you like first, the insult or the injury?"