I just discovered the existence of Avoid Fate . Thoughts on it ?

Regarding the manabase, you may be better off including more than just the four fetchlands. You want to be able to access Dryad Arbor more consistently, so I'd advise the following manabase:

4 Stomping Ground, 2 Mountain, 1 Forest, 1 Dryad Arbor, 4 Wooded Foothills, 3 Bloodstained Mire, 3 Windswept Heath

Obviously, the off-color fetches can be switched around, as the particular card doesn't matter. This lets you both find your colors with the same consistency and to find your protection more easily.

kinda feel like Lotus Cobra could work nicely in here if the land count ever went up, i would look at protecting yourself from sacrifice effects in the sideboard such as Tajuru Preserver, throw Damping Matrix in as your mainboard is immune, Shatterstorm for affinity, and although you've added the revelry's for the damage they're limited and harder to cast compared to Krosan Grip & Ancient Grudge again for combo & affinity, Grafdigger's Cage for graveyard hate etc

And in all honesty splash for a single blue shock so you can play Treasure Cruise although how many cruises i'm not sure, also have you looked at Manamorphose and Simian Spirit Guide?

+1

GlistenerAgent > Thanks for your advice, after some tests, it appears that this deck gets more consistant with 10 fetchlands

PooPlayer > Some of your suggestions are really good and I changed SB quite a lot, so I'll just tell you why I don't like the others : Shatterstorm is 4 ccm which is way above the curve, and by the time i'll be able to play it i'll be dead. Why do you think Destructive Revelry is limited ? It can targets both artifacts and enchantments for 2 mana, and can save me against Chalice of the Void.
You can't know it because it's not written, but I don't want to splash blue because the goal of this deck is to be different of UR kiln fiend decks. Manamorphose and SSG aren't bad, but what would they replace ?

Instead of Rouse the Mob, maybe consider using Colossal Might. It can push your Kiln Fiends out of Lightning Bolt range and it gives a larger buff. Still, this seems like a fast and fun deck.

Surgical Extraction deserves a spot in the SB for sure

Since you're casting quite a few instants and sorceries and filling up your graveyard anyway, have you looked into Become Immense, replacing Revenge of the Hunted? With Gitaxian Probe in your deck, Become Immense might be more consistent.

Nevermind my previous comment. I didn't realize Revenge of the Hunted gave trample...

Have you thought about Noxious Revival for Revenge of the Hunted. You can bring back your choice of buff and if you have Gitaxian Probe you can cast 2 or 3 spells for free if you get Mutagenic Growth back.

Absolutely love this idea. I hope you don't mind, I'm trying to turn this idea into a deck for use in Legacy Tournaments. Testicular Fortitude - Need help for tourney. Would love if you'd take a look at it, and see what you think.