Masked Hero will be OP once all of it's "fusion" monsters released. Used to played them alot on OCG (ameritard TCG sucks) and had lots of fun OTKing people.
Dark Law will ruin the game. Only decks in meta rn that can deal with it are GBs and Sea Stealth, both of which still lose the matchup if you tech a single Water HERO to go into Vapor.