It can let you cast spells from your graveyard when you accidentally mill something that you want access to
Take Up The Shield is a useful card in Heroic decks, especially against matchups like Burn that may make things dangerous if you can't gain life
Dreamborn Dreamborn cards are alternate versions of Disney characters who are created by the imaginations of the Illumineers (you!)
Losheel, Clockwork Scholar Losheel, Clockwork Scholar is another fantastic option for players who want to get aggressive with their artifact creatures
While I don't see this being the most expensive Crystal price-wise (that honor goes to The Earth CrystalThe Earth Crystal), I can certainly see this being one of the most widely adopted across multiple archetypes
Set out on an adventure through Middle-earth with 8 Set Boosters, shiny Traditional Foil and alternate-art cards, and an oversized Spindown for life counter