yugioh gates of the underworld deck list Structure Single Card Dark World Dealings SDGU-EN026 Common : Toys & Games add 1 Dark World card from your Deck to your hand YuGiOh Gates of the Underworld

While it affects both players, when you have the knowledge of the cards in your opponent's hand it's potentially devastating, as being able to force those out of the hand is amazing

If another replacement effect would also change the number of poison counters a player receives, such as that of Vorinclex, Monstrous Raider, the player receiving the counters chooses which one to apply first, regardless of who controls what permanents

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It reads: As long as this spell is on the stack, players cant cast spells or activate abilities that arent mana abilities. If this was able to stop a player from morphing a creature then Sudden Shock would be a great answer to morph creatures