I am kinda racist in BF, playing pure shadow (other pure decks for fun) but in begining I played shadow shadow frost deck on T3 with ... Tremors + nasty surprise and kobold engineer + kobold trick + church of negation + Nether warp (unit porting spell to port enemy close to my church) and this was pretty fine for start.
(later I used pure shadow with satanel or wrathgazer + evocators woe)
sorry no place for revenant units