Cards like Strategic Betrayal and Go Blank are strong not because they are inherently undercosted, but because they are different and if you play them in the right meta they will play more powerful than their mana cost
Likewise, many archetypes have monsters with the same Type and Attribute, which is one connection too many for Small World's effect
Luckily, there are means of circumventing this drawback, such as the card Conjurer's Closet, which allows you to blink any of your creatures, washing them of their Nightmare typing before they'd be exiled from Chainer's death
in major cities like New York, Boston, and Chicago
Even so, they know that Varis is always covering their backs, ready with an arrow if danger should arise from any side
Handily, the Store Locator will allow you to see the contact details of any store, just by clicking on their location on the map