The toughness is the second number and is how much damage the creature can take in a single turn before it dies
In November of 2021 (April 2020 in Japan), these restrictions were lifted, and only Link Monsters follow them, along with Pendulum Monsters in the Extra Deck (see their dedicated guide for more information)
You pay the optional bargain cost at the same time you spend mana to cast a spell, and if its countered the cost is still paid
Whats the difference between a Japanese and English Pokemon booster box
A New Star for Fighting Decks The Addition of this Card Will Add Some Aggression and Power to a Deck Fighting-type decks have had a surge in popularity within the game, thanks to powerful cards like Marowak ex, which has become a fan favorite with its high attacking potential
Whether this was the right decision or not is honestly a gigantic question mark, as the format just seemed to get worse after this decision was made