For the time being at least, there seems to be no stopping the price increases on many of the older Pokemon cards.
As Jason mentions on his website misprintedmtg.com, By understanding the processes in which MTG cards are made, we can understand how the errors we see in our packs come to exist. If youre interested in collecting printing errors, its fundamental to know the basics of card production because different errors correspond to each step in the production process
When your opponent activates a card/effect that targets exactly 1 card you control (and no other cards) (Quick Effect): You can negate the activation, and if you do, destroy that card
Being a goblin is nice, it adds a lot of potential tribal synergies to the card and might see it get some play in those roles
Its especially devastating in graveyard-focused decks where you plan ahead for the swap
destroy that monster, and if you do, Special Summon this card