This place is getting on my nerves.. I found the cannon, but I can't load it with anything. I need to kill the giant ice creature that's blocking the door, and I think I need a key to open the door to the ammunition. Could someone please tell me where to find that god-forsaken key?

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"Six chambers. One bullet. 17% chance of taking your life."

nevermind, I figured it out. I always find out right after I post these

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"Six chambers. One bullet. 17% chance of taking your life."

Yeah, but how do you get a cannonball up the spiral walkway with the two caged ice-blowing monsters going at you??

You use the chain and ball to defeat the ice monsters, except for the 2 in the main courtyard room. You have to use the cannon.