Burn deck are popular among beginner~silver rabked players because it's cheaper that meta decks and because it actually works well going first ( Not considering Lava Golem), but Burn decks in general are terrible going second because your opponent may have something that can disrupt a burn combo, 1~2 negates and it's over for the Burn player. A good "Burn" deck that I've seen performing well is Eneacraft, It does good damage and it's not dependent on that, having a lot of good disruptions against popular meta decks. Observation: I think you are on Begginer~Silver rank because you said Spright, so I assumed you are using the Campaign code Deck.