In terms of reprint value, Sword of Truth and Justice is doing a lot of the heavy lifting at $35, but even then Umezawa's Jitte is around $15
There aren't any major rules that are unique to Artifacts, but many cards care about the number of Artifacts you control, or can only target Artifact permanents
If I were to tell you that, "This is a Rakdos card," thinking of the guild, and you were to argue with me that "No, it's not," thinking of the nickname for the color combination, we would both be right
This time around, there's a Sapphire/Steel deck and an Amber/Amethyst deck to choose from, each with its own merits and unique cards
Now, less than two years later, it's returning to Modern, and its price is surging up pretty violently