It copies all triggered abilities of the chosen creature type, not just ETBs, which opens up so many more interactions than the average Panharmonicon effect
This card is a lot easier to play for one than you might think
More importantly, the critters do not appear in the awesome story that Wizards cooked up for Edge of Eternities
It's also close to a one-sided wipe in a very popular archetype, though obviously if any of your foes bring +1/+1 counters too, its strength goes down significantly
#1 Mutant Menace Back to the Fallout decks, my choice for the best commander deck of 2024 is Mutant Menace, led by The Wise Mothman
On the uncommon side, the best of the black cards in MTG Foundations for Limited is probably Vampire Nighthawk