Obelisk the Tormentor is a force to be reckoned with
This would still be doable , mind you (so long as you could somehow build a version of it with cards that existed at that time), but there'd be some serious concessions
Floowandereeze and the Scary Sea X TRAP Counter When your opponent would Special Summon a monster(s), while you control a face-up Tribute Summoned monster and no Special Summoned monsters: Negate the Summon, and if you do, return that monster(s) to the hand, also for the rest of this turn, your opponent cannot Special Summon, and can conduct up to 3 Normal Summons/Sets this turn, not just 1
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depending on where the stage 2 goes
However, since there is a condition that the enemy must be defeated, it has the disadvantage of being difficult to use in the early stages when resources are most needed, as in solving a case