Adding damage per weapon damage die?

[flashgordon]

I am looking to set up an effect for the Thaumaturge's Implement's Empowerment class feature. The feature has the following in it's description:

When you Strike, you can trace mystic patterns with an implement you're holding to empower the Strike, causing it to deal 2 additional damage per weapon damage die

I don't see a way to add an effect that does this though. The best thing I can do is add an effect to each of the characters weapon actions that do "DMG: 2", and then update them to 4+ when getting striking runes.

[MaxAstro]

As far as I am aware there is no automated way to do this yet.

It would be a nice feature, though, considering there are a fair number of damage-per-die effects and a character may have multiple weapons with different numbers of runes.