That Deadly Hands of Kung Fu cover brings back memories...I had probably every issue of that big B&W mag. The Shang-Chi stories in Deadly Hands fashioned him into a wandering modern-day Kwai Chang Caine, as opposed to the regular comic series. The first time Spiderman and Shang-Chi appeared together was in a special Spiderman issue back around the mid-1970s.

Why would they give everyone superpowers? Doesn't that kind of cancel out any advantage of having them?

I always preferred Shang-Chi over Iron Fist. Except for the Fu Manchu connection.