Damn, I might need to restart then as I cant get thru blackpits cos of shriekers and i cant get the tablet in the cave cos they are there too =C Does poly invis trick them?
Ah, OK, you are on Act 2. Sorry my reply before was about Act 1.
You don't need purging wands and don't need to restart.
Go do some other tasks off your journal and come back to blackpits later.