While the -2/-2 applies only to creatures that are on the battlefield as Malicious Eclipse resolves, the replacement effect applies to all creatures opponents control that turn, including ones that enter the battlefield after Malicious Eclipse resolves, noncreatures that become creatures after Malicious Eclipse resolves, and creatures that become controlled by opponents after Malicious Eclipse resolves
All of this and intimidate for three mana makes Immerwolf one of the most beneficial uncommon lords you can ask for
Collector Boosters guarantee rares, mythics, traditional foils, and retro-frame cards in every pack, making them ideal if you prize aesthetic appeal and set completion over raw card power
With the strategy set to receive support soon, Erebus the Underworld Monarch likely will see competitive play again
So in this thread I will shortly document the playthroughs I have done, team by team, and give some overview on what I noticed for each Pokemon