Nearly every card fits the theme

Scientists Aang's Journey Absorb Vis Abzan Monument Academy Rector Aerial Surveyor Agency Outfitter Ainok Guide Ajani's Aid Alabaster Host Intercessor Alpine Guide Alpine Houndmaster Altar of Bone Ambitious Farmhand Amrou Scout Analyze the Pollen Anchor to Reality Ancient Excavation Angel of the Ruins Angel's Herald Angrath's Fury Arachnus Spinner Archaeomancer's Map Archdruid's Charm Archmage Ascension Arena Rector Arid Mesa Armillary Sphere Artificer's Intuition Ash Barrens Ashiok's Forerunner Asmoranomardicadaistinaculdacar Assembly Hall Atalan Jackal Attune with Aether Auratouched Mage Aurochs Herd Avarax Axgard Armory Ayara's Oathsworn Bad River Balamb T-Rexaur Bant Panorama Basri's Aegis Battalion Foot Soldier Battle Plan Beamsaw Prospector Beanstalk Giant Beanstalk Giant Bebop, Warthog Warrior Bedhead Beastie Begin the Invasion Behemoth's Herald Behold My Grandeur Behold the Beyond Beneath the Sands Beseech the Mirror Beseech the Queen Bifurcate Bilbo, Birthday Celebrant Binding the Old Gods Bioengineered Future Biomechan Engineer Biotech Specialist Birthing Pod Bitterheart Witch Bitterthorn, Nissa's Animus Black Chocobo Blighted Woodland Blightspeaker Blood Speaker

Getting a box at essentially the exact market price (with the convenience and shipping speed of Amazon) makes this an easy choice over the usual secondary-market markups
Ive said more than once that a deck that wins on Turn 2 or 3 cant ever be casual because it exerts too much pressure on the game
The enters-the-battlefield trigger to exile all black and red cards is the big blast, which means I obviously wont be playing it in a Karador, Ghost Chieftain deck
In a blog, Mark Rosewater, lead designer on the game, said that it is counter-intuitive to have the Ring bring in-game positive effects, but it was the only way to get players to actually interact with it