Its mana fixing
The 15% SA probability with the Giratina V SA at $984 creates the widest SA-weighted upside of any Sword & Shield expansion
Kefkas ability to wear down your opponents while helping you keep a steady supply of new cards feels extremely relevant to the current midrange meta in cEDH, although Im not sure that he will outperform Tymna the Weaver // Kraum, Ludevics Opus
It is the version chosen as the featured card on the Chaos Rising Elite Trainer Box, so a lot of collectors will see this artwork first
Personally, this is one of my favorite choices, perhaps in a build with numerous creatures, as I use Ruric Thar, the Unbowed to sap large amounts of life from the opponent, along with the aforementioned damage-boosting cards and with other options, such as Dictate of the Twin Gods
The Raven Man The Raven Man offers discard players a flock of bird tokens with which they can slowly chew through opposing life totals, or perhaps use as sacrifice fodder for Braids, Arisen Nightmare and similar threats