It would not neccessarily destroy the link, but its physical form. Granted this is magic so it cannot be wholly dissected, but we can follow common themes. Most people agree that spiritual attacks and buffs help effect incoroporeal beings such as ghosts and angels. I.E. ghost blades that strike on a spiritual level and such. 

Using this logic, one can assume the staff, a wholly spiritual object given form, would be susceptible to equally spiritual attacks, since virtually no physical attack can stop it reliably.

Edit: I never second guessed its physics defying power. But I also assumed it follows some vague semblence of logic. Even if it exists in the material world, it is still spiritual.