Hearthpwn

I just got him out of a pack and i only play warrior is there any kind of warrior play style that actually gets good use of Y'shaarj?

Not at the moment. But then again, he's going to be in Standard for almost 2 more years, so there's no saying what might pop up later.

Id keep it. Hes crazy fun in some tavern brawls. And in a couple xpac, I can see him becoming a monster.

He could be really good in a super greedy control warrior. 10 mana get a 10/10 and pull rag or ysera. Maybe wouldn't be ideal in fatigue matchups but most classes can deal with 2 very serious threats in the same turn

Crafting threads go in Card Discussion. Moved

I've seen him being played in ramp/taunt Druid on higher ranks. If he's good enough to climb to Legend with now, then there's always a chance that he's a sleeper. 

I'd never disenchant a legendary card, unless it's 100% obvious that it's pure trash, or it's golden. 400 dust is just not that much (outside of the first 3 months of Heathstone).

Varian is much better IMO, but Y'Shaarj is definitely playable.

Quote from Hearthole >>

Money or fun, you can't have both.

http://www.hearthpwn.com/forums/hearthstone-general/general-discussion/10839-about-how-much-are-legendary-cards-in-real-money

I'd say keep maybe next adventure has a great card to combo with it like 20 mana 20/20. (just an example)