[Soyweiser]

Ganas are ethereal undead monkeys. Pisachas are large undead ghoul monkeys Aka ghouls on crack. Large conventional armies kill them. Low amount of strong sacreds that are not po res get frozen by the Pisachas and then killed. And usually the province that they guard has low population anyway.

Hint: Use Z on a province with a recent battle to view the battle report, and shift U to insert units. That way you can view them without having the wiki!