Worldwake (2010) brought Card not found, which requires an Island, so its basically half blue and probably pretty playable in Limited, although not having played that specific format, I cant be sure
This will mostly be down to preference
Amplified Voice allows you to pay 2 Ink to deal 3 damage to a chosen character whenever you play a song, making Ariel the perfect boost to your musical decks
Being one of the first iconic cards, and an absolutely beautiful looking one at that, I'm not surprised this is demanding a pretty penny right now
That means youre purchasing from the secondary market and supporting scalpers
While a bit contradictory with the Amethyst portion of the deck, which has you constantly sending characters back to your hand, if you keep bringing them to the field , your opponent may be put in a difficult situation, unable to use Actions if you play your hand right