mtg red counterspell cards Why is This Unplayed $20 Now? | Weekly #MTG Finance Update Spell Burn (red counterspell) :

This card is the biggest reason why I dont have cards like Azor, the Lawbringer or Etali, Primal Storm higher on the list, as playing expensive creatures without an immediate impact will be tough when your opponent can gain such a tempo and mana advantage with Ravenous Chupacabra

While that deck will certainly have pulled many copies of This Town Ain't Big Enough out of circulation, by itself it isn't the main reason for this spike

PRODUCT HIGHLIGHTS Contains 36 booster packs 15 cards per pack Series: Return to Ravnica Item Type: Booster Box Brand: Magic The Gathering Release Date: October 2012 Company: Wizards of the Coast UPC: 653569714668 Stock #: 214323 Our Guarantees to You, Our Valued Customer

And note that the last ability triggers on opposing artifacts going to the graveyard, too