You must be at least level 100 to enter this dungeon instance.
Unlike the original version of this dungeon, you will not get waves of lizardmen coming coming down the ramp with each group that you kill.
Golems do not drop clay golem hearts, so are not required for the idols. You click on the idol and it will spawn ancient Thulian dreadfiends and frightfiends. Note that the dreadfiends will be epic x2, although they are simply heroics with more health.