Custom Weapon with 2 runes

[panzhuli]

Hi friends -

I'm playing a campaign and my character found a striking returning starknife. I tried to create a custom weapon, and attempted to attach both the "striking" and "returning" runes to it, but get these errors:

Property Runes: Resource Overspent: 1 of 0
Returning: Weapon must possess at least 1 rune slot.​

Is there a way to attach 2 runes? Thanks!

 

[Mathias]

You may not add more property runes than the bonus you've added to the weapon with potency runes, so a +2 weapon can have 2 property runes, for example. So in this case, a +1 striking returning starknife should be good.

 

[panzhuli]

Thanks! I added the weapon potency +1, which solved it