Hearthpwn

Either you kill your opponent fast, or Frost Lich Jaina and spells give you the victory on the long run.

You can include some Doomsayer, Furbolg Mossbinder, or stuff like that if you want to get rid of the poor cards you're offered.

EDIT:
Thanks for the upvotes! This list is meant to be cheap except for Jaina of course, but you'll still get an easy  win without her. Jaina is there to save your ass end game if shit happens. I guess you noticed that the point here is to use battlecries so your opponent won't benefit from it, with minions you can get rid of with your heropower, and if needed with Jaina heropower.

If you have are on budget you can cut expensive cards, here are cheap cards you can consider using:
Novice Engineer, Wolfrider
Abusive Sergeant, Acherus Veteran, Glacial Shard, Fire Fly (2 life for your opponent but comes handy on T1/T2), Kobold Apprentice, Ravencaller, Wicked Skeleton, Raven Familiar, Fungalmancer

If you have plenty ressources, then you can include stuff like:
The Darkness (not that usefull, but this card should be happy to finally leave your closet)
Rattling Rascal, Doomsayer,  Furbolg Mossbinder, Scorp-o-matic...

Ironbeak Owl and Furbolg Mossbinder are really usefull to use on your minions if your opponent gives you stuff like Ancient Watcher or Rattling Rascal, or to use on your own Rattling Rascal!

Upvote if you enjoy :)