He-Man and the Masters of the Universe (2002)

The Kulatak says Eternium is their "most vital resource" but it is not explained how they use it. They live in houses made of the ice and snow of their caverns, they don't appear to use weapons and, as Eternium is described as a hard metal, they surely don't eat it. Given that no one knew they existed until the events of this episode, they most likely don't trade it. Other than some jewelry and trinkets (the necklace the leader wears appears to contain bits of Eternium), what exactly do they do with it that makes it "the very reason they still exist"?