Master Gideon:
It seems that the most evil creatures in
the Lair of Antharas are the Malruk knights, Malruk berserkers,
Malruk lords, Limal karinnesses, kariks, pytans, and pytan knights.
Remember that you cannot fill your crystal with the souls of weaker
creatures. The crystal develops a refined taste and demands souls of greater
evil. If you notice that your crystal has stopped absorbing souls, try
killing creatures of more evil.