[@skarsgard] Ahh, that age old question: Can you overcome a gravity well with a cannon ball blasted out of a magical cannon? I think it has a lot more to do with how the gravity wells are placed and how easily the cannier can adjust trajectory for them. Sadly, I don't know enough about physics to properly answer the question. Real cannons can fire about a mile in normal gravity however. Honestly, I doubt Amber's going to be anywhere near a large scale fire fight without good reason. But you never know...