The Darkest of Diamonds

So you wish to summon a Scra- Chi? You must need a Dark Gem Stone of Time, hmm? To make one, you'll need to bring 77 Black Diamonds to Spirit Magician Heras. Black Diamonds are products of the Stone Weavers. Heras is a magician who communicates with the spirits. He spends more time with spirits than with people. He doesn't deal well with others, but I'll tell him you're coming. The rest is up to you.