I think Spectral Sailor has a slightly better chance of being in the deck, simply because its capable of be played as a 1-of or 2-of while Faerie Miscreant needs to be a 4-of to be of value, and I dont think Mono-Blue has that many slots available
Youll usually be at least +1 from the trigger, and it even happens on attack as well
Like Azure Mage, its a nice way to spend mana and draw cards, and it has synergies in wizard decks
Youll be free to execute a combo win, build your board presence, or otherwise enact your game plan
Separately, the promotional foil card coming to Disney Villainous has also been showcased, featuring a slumbering Prince John clutching one of his precious bags of gold
Lion's Eye Diamond ($817) Lion's Eye Diamond (also known as LED) was originally seen to be pretty bad, but is now a 4-of in Legacy decks and worth an incredible chunk of money