Its beauty and the fact that it hails from Kalos where Mega Pokmon originate is undoubtedly whats launching this card towards the top end of value for the set
Here are some examples I have thus far, but Ill see what others I can find later on
And since the Hero deck is faster out of the gates and presumably can inflict some significant damage before the Rats are much use on defense, if the Plague Rat deck does eventually shift to offense, must it hold some of its forces back, and if so, how much
it'd be like if i said people who collect cards and don't play the game are actively harming the hobby
Leaving mana open with this card out also makes it impossible for your opponent to attack profitably into it, lest they lose a couple of their creatures or one big one for doing so
Fighting types, in particular, are strong even without a Stage 2 evolution