Black trades resources for power
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
Sporocyst BPhillipYork: So hitting ravenous on this baby is gonna cost you 11 mana, which is, a lot
It pumps your team will going up on loyalty, making Zariel, Archduke of Avernus an all-in aggro planeswalker for attacking decks
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
As a follow-up set, it remains appealing, but it lacks the depth seen in OP01