Well before that, literally just discovered it and saw Roushk bang the acolyte
ok so the way you unlock the rest is by getting the full lizard statue from 3 different locations and unlocking the purification lake. starting with the tail it's a freebie and literally gets forced into your inventory while unlocking the temple, the second is in the bandit camp while exploring and third is I believe given by the witch for doing her quest for the lizard egg, but as Averill said getting it via cheat menu breaks the game since getting the egg is the way you dicover the corrupted lake/forgotten temple.