In Geneology of the Holy War, after Altena finds out that Travant had killed her parents and was not his real daughter, Travant heads into battle against Seliph’s army. Before he does so, he gives his son, Arion, the lance Gungnir, and he wields a Silver Lance instead.
I don’t know if this was ever addressed when Travant was released, but I’d figure I’d throw it out there.