Soul Tithe
By imbuing 1 or 2 extra runes of the appropriate level into a weapon; the weaponsmith can inset the weapon with a soul tithe, ensuring that the Valkyries will transport the weapon with its wielder through death, without the wielder requiring Runes on them to pay for it.
These Runes are not used to empower it, nor as its magical glue, but 'inset' near the end of the weapons completion.
The limit is 2 Runes per weapon.
For example
Player A has never lost a life, and has a tithed weapon with 2 Runes within it. When A dies, the Valkyrie will take one of those inset Runes as payment, and A will come back through the bifrost with their weapon.
A then dies again later that day, and the last inset Rune is taken by the Valkyrie. A the comes back on their last chance with their weapon with them again.