Artifact Creature: Foundry InspectorFoundry Inspector, 195113 Inclusions Artifact Land: Treasure VaultTreasure Vault, 114096 Enchantment Creature: Eidolon of BlossomsEidolon of Blossoms, 96451 Enchantment Artifact: Spear of HeliodSpear of Heliod, 21377 Kindred Enchantment: Prowess of the FairProwess of the Fair, 14203 Kindred Sorcery: Aquitect's WillAquitect's Will, 12577 Kindred Instant: Shields of Velis VelShields of Velis Vel, 7867 Kindred Artifact: Altar of the GoyfAltar of the Goyf, 4417 Instant Sorcery: Said // DoneSaid // Done, 3251 Spear of HeliodSpear of Heliod held the title of "Best Glorious AnthemGlorious Anthem" for more than a few years there, and as much as it's been usurped now, it's still a great card

My first impulse was that if you use it alongside cycling cards, you can throw one mana cards into the graveyard, exile them with these two, and cast otherwise uncastable spells for free: Crashing Footfalls, Ancestral Visions, Gaeas Will, Hypergenesis are potentially cool, but also what does it matter if you draw a lot of cheap creatures
The ability will trigger no matter what happened to the artifact after it entered
You get out what you put in