Mafia 18. Nightmare Seller.

I think I've figured most things out, but the last part remains a mystery and keeps bothering me:

The "iron shoulder" simultaneously hints at a musketeer. The clue is as obvious as a speech error – "a flying arrow pierces the shoulder." A flying arrow is the Native American leader Tecumseh; the text mentions a curse – see the "Tecumseh's Curse" page on the wiki. A quote from the Sky's signature is, "Bush, are you feeling alright?" Someone mentioned this in one of the games' chat rooms.

What does this mean? How is the curse on American presidents related to a pine cone? Do Native Americans live in the forest? Or does the article mention George Bush, and the Sky's signature says "bush"? Am I missing an important link in my reasoning – someone's post in one of the games' "general discussion" sections? Tell me about the post that is so important to the game. Is it some kind of Arandor's dream? How does the "iron shoulder" hint at a musketeer? Is the musketeer always ready to offer his brave shoulder to someone in need? Is his bicep as hard as iron? I got a C- in Russian; where is the speech error in the phrase "a flying arrow pierces the shoulder"?

I really want to fill this blank spot in the diagram.