Rank in strength

[Superfan90]

While I'm there, that the board can think is not even a new idea, it's as old as the Surfer's 80s series where it outright shares his soul for the reason why it can think ("I'm not alone, I have my board, which is as one with me." "There are many souls in the infinite universe, but only one is like the Silver Surfer's"). The Slott run just gave it a name.

Trying to analogize the board to Mjolnir does not work. It's a part of him. He makes it out of himself. They share the same soul. It's his living flesh.

Edit: And I feel like the whole "then it should hurt him when...". Look, until we all have surfboards that are one with us, made out of our own substance powered by the cosmic energies that infuse us and inhabited by our souls to give them awareness, trying to figure out why they don't share pain is maybe impossible ;p

Actually Surfer felt pain when Shalla Bal blasted a hole in his board, enough pain to make him come out of coma in Slott's run.