This is because scarcity creates demand, especially among collectors who are eager to complete their sets or acquire unique pieces
While the Penny supporter card was handy in certain scenarios, here Cassiopeia lets you add any two cards from your deck into your hand as long as she is the only card in your hand
I remember getting kind of harassed by the older guys at the comic bookstore, Klemmer says
It's easy to hit, has only one point of health, it can't damage you, has a chance of giving you some coins every time you attack it, and gives you a ton of money if you manage to kill it
Marcy: Vayne is the actual villain of FFXII, a duplicitous man out for his own needs and goals at the cost of everyone else (even his brother)
The arrival of Celebi EX decks, which take a couple of turns to get going but do almost impossibly high damage once set up, also led to a rise in much more common, seemingly mundane cards being used like Rapidash and Ninetails, which suddenly found themselves as the perfect counter to the strongest, rarest ones in the game