Back to your regularly scheduled mod-seriousness...

There is certainly a creature in the caves! It's a massive creature, some thirteen meters high, and it's currently sleeping. Odysseus, mind thyself.

It looks something like this. Should it be disturbed, it will attempt to cause a cave-in by banging the walls of the cavern, so as to trap its 'food' for later.

Hope somebody's good at monster-killing!