This is my burn deck, it is very competitive and is probably my best deck. I often win on T4 and have even won on turn 3.
THE DECK:
Goblin Guide -- Our best 1 drop creature, he usually gets at least 4 damage in then still needs to be dealt with!
Monastery Swiftspear -- Our second best 1 drop creature, can sometimes even be better than the guide when used in combination with burn spells
Eidolon of the Great Revel -- Eidolon is a house. He deals significant damage to our opponents given most spells in the modern meta-game are 3 CMC or less, with a decent body to boost.
Grim Lavamancer -- He's a shock on a stick. Better than people give him credit for, he gives us reach past T4.
Lightning Bolt -- The best 1 drop burn spell in our deck, always play 4
Searing Blaze -- Bolt# 5-8 also clears the path for our Goblin guide or swiftspear.
Lava Spike -- Bolt# 9-12
Rift Bolt
-- Bolt# 13-16
Shard Volley -- Bolt# 17. I chose to run 1 instead of 2 because having 2 in the opening 7 is never nice.
Boros Charm -- This is our best 2 CMC burn spell in terms of damage. Also can be used to make our creatures indestructable or give one double-strike but this is nearly never used.
Atarka's Command
-- Amazing against any decks that run lifegain (Abzan) and has many other added benefits as well. This card has won me games on Turn 3. Also gets around Leyline of sanctity and spellskite.
Skullcrack -- An extra "prevent lifegain" effect for Abzan, soul sisters, BW tokens or anything else that has lifegain. Also "damage cant be prevented" is a nice added benefit.
SIDEBOARD:
Deflecting Palm -- This card is so good and people dont even realize it. Very good against Tron (Emrakul), Infect, affinity and even Abzan.
Path to Exile -- Amazing spot removal takes care of almost anything from Tarmogoyf to Wurmcoil Engine or even Pestermite/
Deceiver Exarch
Kor Firewalker -- This is for the mirror match. I fetch+shock myself twice in a row to get him out but its so worth it and almost always wins the game against Burn.
Destructive Revelry -- This gets rid of pesky enchatments like Leyline of Sanctity Splinter Twin and Artifacts like Cranial Plating Spellskite while also advancing our gameplan. Amazing card.
Volcanic Fallout
-- This card is good against a lot of match-ups including infect, BW tokens, merfolk, affinity and even goes through Leyline of Sanctity
Molten Rain -- With Splinter Twin gone, we can now use our last 2 SB slots to deal with Big Mana decks or additional Skullcracks. Either choice is fine, I've decided with Molten Rain for my meta.
Suggestions are always welcome!
