This is a more fun variation of Tidesoftime's standard Modern Shaman Control (linked down below) that begins exactly as any normal shaman control would. It then suddenly switches to power-hitting with a Windfury Stranglethorn Tiger and Leeroy Jenkins - powered up with Flametongue Totems and Rockbiter Weapons. By having a solid amount of card draw in this deck, it tries to fish for these combo cards and catch your opponent by surprise with obscene burst.
Shaman make for very strong control decks with their signature Feral Spirit taunt, cheap powerful removal, and a hero power seemingly made for Defender of Argus plays. This long-prevalent meta has covered up the Shaman potential for explosive burst. When you play Stranglethorn Tiger, it greatly confuses them as to why it is in what until turn five seemed to be a standard Shaman control deck. At a certain point in ranked, before 10 or so, players start actively playing "around" certain decktypes and particular cards that are expected (or not) to be in those respective decks. The kitty throws them quite a curveball, but considering the lack of burst shaman out there on the ladder, it will not give away the strategy unless this gains popularity.
The original deck contains a Loot Hoarder instead of Wild Pyromancer, but after several dozen games trying both I feel that Wild Pyromancer has spectacular synergy with your 2 x Acolyte of Pain that nearly always ends up giving me more cards than the single loot hoarder to dig deeper for your combos. This is not to mention that Wild Pyromancer goes well with spell-spamming decks such as this one (see EKOP's Pyro Control Shaman below).
The above suggested replacements are rather straightforward and are as close to their Legendary counterparts as possible. This deck is a lot less polished than the core shaman control that is linked below, and is somewhat open to innovation. I have tried out quite a few modifications that include Ravenholdt Assassin and Bloodlust with significant degrees of success. The Black Knight also does well here in getting rid of sticky taunts if you have it, or alternatively try Earth Shocks to bypass taunts when your burst combo comes around. The trick is really about not over-complicating the burst and keeping a solid, balanced deck for when your combos do not play out as planned so you can still win even with an imperfect part of said combo.
Good luck, have fun, and hit legend!
Tidesoftime Control Shaman: http://www.hearthpwn.com/decks/40063-tidesoftime-1-legend-all-seasons-modern-control
Ecops Pyro Variation http://www.hearthpwn.com/decks/39978-esgn-fight-night-s5-ekops-allahkir-akbar