yugioh banned deck Replacing cards in Yu-Gi-Oh! Master Duel Swordsoul Explaining All Banned Main Deck

You can stop your opponents monster effects, disrupt their Summoning strategy by making a monster unusable as material, or make it indestructible while its stuck in Attack Position so you can run over it again and again to smash their Life Points

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

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

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