Since the last update Pauper has suffered some bans and the decks have been evolving with new additions, so I will adapt my Burn build to this new meta.
Needle Drop comes back as a 4x, Magma Jet is gone. This change reduces the mana curve, so I can cut one land. And to make space for the playset, I will cut one Curse of the Pierced Heart.
Sideboard : Blur of Blades is gone, as Tireless Tribe decks are not Tier 1 now that Gush is banned. Keldon Marauders function as a blocker in some cases, against creature-heavy decks and at the worst it's a 2 mana 2 damage. It also can draw out a late game counter as well if I'm low on gas and need something to land. Also good in the mirror, where can be a 2 mana Lava Axe and punishes the removal this creature may eat.