I come to find myself in this exact same position.
I went to the cathedral, killed Malagoth(sp?) priest
Combined the spell + blood = taught bane to everyone in my party.
Went up to homestead - updated journal talking to Icara
Now when I open up 'Rift Travel' there is no text for Mines(Entrance) or Mines(Chasm). I can't find anyway to get back inside the mine, ran around the desert and parts of Lucilla with no luck.
Anyone have experience with this either quest step or bug?
I really want to kill those invulnerable mobs!