Arcane / Battlecry mage

Best with Arcane Flux, but anything that synergizes with spells or battlecries can work.

EDIT: this deck has become a lot less feasible since the 20.8 patch, as it doesn't work well with Rally the Troops. 

Infinite Arcane is meant to counter bomb warrior, but watch out that you don't play it if they are still likely to have card draw murlocs, or they will blow you up all at once.