yugioh banned deck Replacing cards in Yu-Gi-Oh! Master Duel Swordsoul Why Are These Yu-Gi-Oh Cards

Deadeye Navigator quickly becomes the most worrisome threat when it enters the battlefield across the table from you

Poison Mushroom: Because True Exodia causes whoever owns it to lose the game, anyone using the card does so by forcing their opponent to hold such a bad card, as the card states that whoever is controlling it loses the game, not whoever deck it was in

And they can deal significant damage to your opponent's Pokmon

UR Ultra Rare Speedlift X SPELL Quick-Play If you control exactly 1 Tuner and no other monsters: Special Summon 1 Level 4 or lower "Speedroid" monster from your Deck

While the breadth of Modern discard makes this less of a problem, there are still matchups where Thoughtseize isn't very good, such as against decks like Dredge that want cards in their graveyard or against Burn, where the damage you take is relevant