The Hills of Elfshima are a forgotten range of hills beyond Mumm-Ra's pyramid. When viewed against the dawn you can see that these hills resemble a sleeping form. The name Elfshima is an anagram for the truth behind the hills, I am flesh. The hills are not hills, they are a sleeping giant turned to stone thousands of years ago. The Mask of Gorgon was able to re-awaken the hills and reveal its true form, the Child of Gorgon.