Legality depends on the tournament format -- Sephiroth, One-Winged Angel Emblem can be legal in some formats and banned or restricted in others
At 60 microns thick, they are stronger than standard 40-micron sleeves, shielding your cards from bends, scratches, and everyday wear without making shuffling difficult
each player Special Summons as many of their banished monsters as possible
Like I mentioned before, at the World Championships this year, there were a handful of players that made deep runs with Charizard - all of which played the Dusknoir line for its raw power and more or less accepted the decks inconsistencies (and its abhorrent Dragapult matchup) because it had such a favorable Gholdengo matchup
Since it ran during the COVID-19 pandemic, most of the events were held online, with players battling it out over a webcam