The Master Rule introduced Tuner Monsters and Synchro Monsters, as well as added a 60 cards upper limit to the Main Deck, renamed the Fusion Deck to Extra Deck and added a 15 cards upper limit, and allowed the Side Deck to be any amount between 0 to 15 cards
Psychic Rover - 0/700 I move to the battle phase and attack Psychic Rover with Reptilianne Scylla. I activate my face-down, That Six. Still, Reptilianne Scyllas attack went through anyway
That is largely due to the popularity of the character, as N has captured the hearts of many fans with his unique backstory and philosophy regarding Pokemon
Over time this can wear and tear on your cards, decreasing their lifespan and condition
In other words, if they cant beat Malicious Fiend, they cant even enter battle phase without losing a lot of life, and all their monsters