I would explain hockey to those that do not know of what it consists of in 3 simple ways. First, under the assumption that I am already in hell, and I am teaching the sport to either tortured souls, or demons. (All of my hell knowledge comes from lucifer, great show, until season 5 and 6, holy fuck that was so bad). The first thing you do is scoop up some magma (not lava, because we are underground) and you pour that magma into some stick casts until it hardens into metal? No idea how science works. Second, you chisel a hellish stone nice and smooth into a puck shape. Third, and most important, and also the hardest, the skates we will use is something that floats on magma without burning, because our rink is going to be a magma pool, i do not know what is on our feet though, let's just assume i do. Once we have all of those materials, it should be pretty straight forward to teach people how to play