Each Pauper Pack contains a playset of every common hero specific card that pertains to that hero, from the set it comes from.
In the case of the Generic Pauper Pack, you will receive a playset of every Generic card in that set. The picture below shows the contents of a Dorinthea Ironsong Pauper Pack.
To see our current Pauper Pack offerings, check out this link! (Pauper Packs)