Sephiroth, the Savior / Atraxa, Grand Unifier (FCA) $35 Most FCA cards are excellent in one Magic format or another
From the demons that run the crime families of New Capenna, to the reappearance of an iconic Phyrexian Praetor
Features popular cards selected from throughout Magics 15-year history, including power-house cards like Ancestral Vision, Quicksilver Dragon, Demonfire, and Flametongue Kavu
The party's thief (sorry, "treasure hunter"), Locke Cole, doubles back to South Figaro on his own, which leads to a fun sequence where you have to sneak through town
For the most part, this is the only color pair that cares about artifacts, so you'll be able to get the key cards from the deck mostly unimpeded