wasn’t there a field spell that allowed you to use monster slots to hold spells that perfectly synced with destiny board
the yatta lock is very amusing
you can lock your opponent out of drawing cards for almost the entire game
You know what card is also amusing?
Dimension Fusion Spell Card
Pay 2,000 Life Points, then both players special summon as many banished monsters that they have as possible.
Or perhaps the most powerful banned card ever, the Spellbook of Judgement Spell Card
During the End Phase of the turn this card was activated, add “Spellbook” Spell Cards from your Deck to your hand, except “Spellbook of Judgment”, up to the number of Spell Cards activated after this card’s resolution, then, you can Special Summon from your Deck 1 Spellcaster-Type monster whose Level is less than or equal to the number of cards added to your hand by this effect.