The following non-town cards mention towns in their rules text: Prishe's Wanderings PuPu UFO Qiqirn Merchant Reach the Horizon The Wandering Minstrel Town Greeter Travel the Overworld How Do the Adventure Towns Work
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they just have to be the best version available
1 Counterspell
A players hand of cards is another of these zones (although the rules refer to that one without a cool fantasy name)
This is an easy include in basically any Goblin Tribal deck, which is usually Krenko, Mob Boss for more competitive / Combo or Grenzo, Havoc Raiser for more casual / less linear play, or Wort, the Raidmother if you want to toss in some Spellslinging finishers as well