Like mount rushmore.
I'll have Lanaur, the King of Fear and his eagle eyes scaring holes into the landscape. (focuses sun rays to burn stuff
)
I'll have Magnalorum, the Orator, with his mouth set for another speech. (echo chamber)
I'll have Vijay, the Victorious, with smile of blades (whetstones/flint in that cave)
I'll have The Silent Emperor, offering his wisdom (chamber with small holes leading to surface, making voice-like sounds)