Creatures :
-Kiln Fiend : The card that makes this deck exists, your goal is of course to abuse his ability to delete your opponent in one combat phase, which often happens on turn 3 or on turn 4. After that, if you didn't already won, your chances to win will fall down, because your opponent will probably draw a removal (if he didn't had one in his opening hand), and since it has only 2 toughness, a random Lightning Bolt will burn it if you can't protect him.
-Flamekin Harbinger : Turn one tutor for Kiln Fiend, virtually making 8 kiln fiends in your deck. It can also serve as a chumpblocker once his job is done
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Monastery Swiftspear
: Another turn one drop, very useful to dip into your opponent's hp in early game. It can also kill turn 2 with a lot of luck and a god hand
Spells :
-Assault Strobe : gives double strike to Kiln Fiend, making winning on turn 3 quite easy : you only need 2 others spells to do lethal damages
-Gitaxian Probe is useful because it allows you to see if your opponent has a removal before playing Kiln Fiend or all-in, give 3 damages to kiln and draw a card, for free, what could you expect more ?
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Rouse the Mob
: because the evasion is really needed, no one will say "I don't block your Kiln Fiend, I like to live dangerously", and getting chumpblocked is one of the worst thing that can happens to you. Not to mention they also pump kiln for +5/+0
-Mutagenic Growth gives 5 extra damages to your kiln for free, do I really need to say more about this awesome card ? Well, i can also save your Kiln Fiend from Lightning Bolt and Anger of the Gods, making it EVEN more awesome !
-Ranger's Guile : cya removals gg easy lulz
-Apostle's Blessing : your bread and butter card. It can save your kiln fiend from a removal, making it unblockable, or whatever you want it to be... However, care if you give Kiln Fiend protection from green or red since you won't be able to target him with your boosts after it resolves !
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Tainted Strike
: act as a Assault Strobe and make turn 2 win possible with monastery swift-spear
Please check out my other kiln fiend, I need some help about the sideboard :
Advice are welcome, and excuse my bad english, it's not my native language