However, casual formats can accept proxies in your deck, depending on the acceptance of other players in your play group
Unlike a fog effect or a Teferi's Intervention, Masako can't protect you from attackers unless you have a board state to defend with - but you also get to pull the mother of all combat tricks on whoever attacked you
We've had a bunch of spoilers slowly revealed in the past few days, including a lot of the Bonus Sheet reprints
No, creature spells are not sorcery spells
You also won't gain any life if the result is somehow negative
Enchanted creature has "Whenever this creature attacks, if its toughness is 3 or less, put a +1/+1 counter on it.") If you don't choose a second target for Cut In, the Young Hero Role token won't be created