Originally Posted by
ESG
Given that list, I would have boarded in more Devastating Dreams. Burn can't do much without land, and if he's running Goblin Guide or Grim Lavamancer, it wipes out his dudes. Ideally, you want to stick a large creature and then cast the Dreams, but it can be profitable just to use it early as a more powerful Raze. Sounds like his topdecks bailed him out in Game 3. Even if he knows you're on that plan, Burn doesn't want to have to keep a land-heavy hand and hope to draw into a chain of business spells. Board out Worm Harvest and Dark Confidant. Back when Zoo and Burn were more prevalent in my meta, I ran Kitchen Finks, which helped a lot. You could also run COP: Red.
In regard to your sideboard, what other decks are you expecting at that tournament?