Plus, there's something nefarious going on in each land's art, a fun nod to the murder mystery flavor of this cross-over
Harness the strong aura of Mega Lucario ex, embrace the overflowing power of Mega Gardevoir ex, and team up with more of these powerful Pokmon boasting devastating attacks and massive HP
It pumps your team will going up on loyalty, making Zariel, Archduke of Avernus an all-in aggro planeswalker for attacking decks
What if the Battle is Defeated on an Opponents Turn
Artifacts are difficult to destroy, so it usually sticks on board, dissuading opponents from playing future threats
Of course, getting up to the 14 loyalty needed to use this ability will be incredibly difficult without ways to speed up the process (such as proliferating yourself), or with a big enough army to protect Karn from attackers for the two turns needed to set him off