I was lucky to snag it a few years ago before the crazy boom we are currently experiencing
I even played this into a Ground-type with the cards I had available at the time, which had a fair amount of substitutions, and it still survived and beat a Ground-type deck
Interestingly, though, the number one spot is the only time Arceus ex appears in the current top ten, according to Limitless TCG
If the original creature had a characteristic-defining ability that determined its power and/or toughness, that ability is not copied
What happens when a powerful "Creature type matters" relies on a type that isn't as ubiquitous
Or just the fact that Hooting Mandrills plus Eldritch Evolution in the same turn is four mana, which is the same as Unburial Rites Flashback