Stiles’ real name is “Mieczyslaw” which means “sword of glory” so what if Stiles has something to do with fixing Kira’s sword back into place. What if Scott doesn’t need to bite him to get through the rift because there is still a little fox spirit left in him. This would explain some theories made throughout season 5 of Stiles being a supernatural. And the ability for Stiles to fix the sword could mean many things:
1. They could get Kira back but the writers are such racist motherfuckers I doubt it will happen.
2. The sword will be used to bring Theo back to hell (I hope)
3. The sword could be used to open some kind of rift or barrier that will allow humans to pass through.
4. The sword will be used to eliminate the wild hunt once and for all.
But I still believe the sword is an important object we should pay attention to, especially the amount of attention it’s been given the past couple episodes.