It is nothing really new but i don't see many people playing Boris like that, so i want to share it with you.

Deck List
4x Blood Frenzey (propably the best card in this deck. I always won the matches with BF in my starting hand)
4x Crippling Blow ( slows down aggressiv decks with a lot of allies like Zaldar, some Ambers or Boris)
4x Retreat ( helps keeping boardcontrol. Save it for bemoths, Ravens or Aeons)
4x Puwen (another turn two drop and with 2/3 better than Blake)
4x Jasmine
4x Aldon ( i prefer to play, because he often swallows a fireball or a lightningstrike plus one hit.)
2x Smashing Blow ( helpful against gweneth and amber but also good for Snow Saphire or AoE wich could really suck)
4x Jewelers Dream (the multitool. Kills allies with x/1, strikes against armors and other weapons and allows you to play raven and a retreat in the fith turn or something simmilar.)
1x enrage (saves lifes)
1x rampage ( only useful against allie-heavy aggro decks. Otherwise recource it.)
3x raven (the 6 defense is a nightmare for every burn player. She survives most attacks and does a lot damage herself)
2x aeon ( protects aldon and Jasmine and is almost impossible to kill)
1x Snow Saphire (Takes gweneth and Amber off the Game and other ally-heavy decks)
1x Kings Pride ( mostly the gamewinner when played)

1x Boris
40 Cards

It doesn't look spectacular but it's highly efficent. I think some will say keep it down to 30 cards, but that is not the idea.
Playing Blood Frenzey the second turn is alost all the time the right choice. (exept zaldar drops two sparks or something like that)
Then you gain board control with cripplingblow, retreat, jewelers dream or just by playing the big guys like aldon or Jasmine.
Raven and Aeon will follow and your opponent cannot clean the board. Even with Nishaven or a supernova he will need two turns, while you hit him hard.
Only if you can't play BF in the first three or four turns it's becoming a little tough. But mostly you can keep board control untill you draw BF and then the game is on.
For the last eighty matches i lost only four times:
gweneth. ( I didn't draw BF till the end of the match but one more round and I would have won)
Majia ( Same as gweneth)
twice Jericho ( he's my archenemy. Almost everything he can do is the perfect counterpart to my deck. His ability removes BF, cripplingblow and enrage. Tidal wave removes even raven and aeon and curse slows me down a lot. It's very hard to win this matchup)
Other matchups were no problem except for an elementalis, which i only beat becuse i play 40 cards.^^

Comments and criticism are highly apreciated.