Its controller may search their library for a basic land card, put it onto the battlefield tapped, then shuffle.Draw a card
As long as you have at least four other characters on board, they all earn an additional lore from questing after Lucky, so playing this character on curve can be extremely powerful
Then the chosen creatures are returned to their owners' hands simultaneously
This has even been dubbed the holy grail of Pokmon cards
This magician might possibly be the reason the new continuous spell card for Endymion also treats itself as the Citadel, so this guy can remove counters from it to summon himself ( that spell can also hold just exactly enough counters for this guy to summon himself, coincidentally )
Its honestly kind of one thing I dislike about the community haha, people just following the trend and valuing something more super arbitrarily