I thought about Primal Harpoon.

Initially I thought that a longfang would be more appropriate for its role than a direlance given how harpoons are generally used, but then it occurred to me that something called Primal Harpoon might be monstrously large and more suited to the direlance statline. I imagine it as a moonsilver weapon in so far as it's an enormous piece of carved behemoth bone adorned with moonsilver telling the tale of its original wielder's victory over the monster. Its passive power is simply that it's a direlance that can be thrown up to short range but later Evocations...