That's because The Ooze's triggered ability checks the creature's existence just before it leaves the battlefield, and it still has all those counters on it at that point
One other thing of note is youll know if a player is going to attack you or not before they do: they must pay at the beginning of combat, which gives you a chance to use removal before they get an attack trigger
This caused me to bounce off Magic: The Gathering on repeat for a long time
reveal 1 card in your Extra Deck, then look at your opponent's Extra Deck, also banish all cards in their Extra Deck with the same name as that revealed card
Event Hourglasses carry over, so stop using them once you've collected all rewards from the Blastoise Drop Event
The Rank 8 "Exosisters Magnifica" uses addition like Ritual and Synchro Monsters, requiring 2 Rank 4 "Exosister" monsters