Silence immunity material

Is there a material that adds silence immunity to artifacts? I know artifacts can have this effect as I just salvaged an axe with it but did not get the material for it, and thought my list of materials was pretty much full except for legendaries yet I never picked one up. Can anyone confirm if this material exists?

“Absorber of silencing”
It’s out there.

Delusion occultist gives all your creatures immunity to scorn and silence.

Thanks for the replies. Guess I just had bad luck so far.