Part of the original Base Set's earliest print run, "Shadowless" cards lacked the drop shadow behind the artwork window, marking them as among the very first Pokmon cards ever produced
Whenever you attack, exile cards from the top of your library until you exile a nonland card
Samurai of the Pale Curtain Just like Anafenza, the Foremost , this prevents creature loops but doesnt affect other card types
That sure is a lot of fantastical terms all at once, but essentially it means that were storytelling magicians competing against each other by summoning copies of Disney characters to see who can gather the required lore first
Legality depends on the tournament format -- The Explorer can be legal in some formats and banned or restricted in others
Whether or not this is a good thing, however, remains to be seen