Atraxa, Grand Unifier At one point I would've probably called Archon of Cruelty the best creature to cheat into play
Toss it on a creature for defense, and now force them to decide if they want to swing with their big beater into your chump blocker for two cards
"The game (designer) assumed people would do thing A, but I did thing B." The key to accomplishing this is to make your mechanics focused so they clearly imply how they're supposed to be used, but leave enough open-endedness that it allows players to find other uses
And just in case keyword counters aren't your jam, the other legends will give you some other solid options, too
Just How Hard Were Pokmon Cards To Find In The '90s
The sheer density of illustration rares and parallel variants makes it a challenge for collectors to calculate exactly how many Pokmon cards exist across these expansive sets