Conversation so far:
What were Pinhead's (Hellraiser) powers?
Pinhead is an extremely powerful being, and as such, has several supernatural abilities.
What are some of Pinhead's (Hellraiser) supernatural abilities?
Pinhead's preferred method of attack is by summoning hooks and chains to mutilate victims, often pulling said victims in several directions to tear them apart.
What are Pinhead's (Hellraiser) weaknesses?
In order to act in the physical world, Pinhead needs to have been purposely summoned through the Lament Configuration.

Question: What else is a weakness?
Self-contained rewrite: What else besides needing to have been purposely summoned through the Lament Configuration to act in the physical world is a weakness for Pinhead (Hellraiser)?