There you go, I made a video on it.

Idk if this has been found, which it probably has, but I've discovered a way to duplicate the spade key. It's not useful in any way though, you just pick up the keys one at a time and when you walk up the the altar door, it acts like it normally does. So, has this been found or not? Nothing serious, just wondering if it has or not.

I think it shouldn't be banned. In other games, such as OoT, save warping is used to warp to a destination closer to where you need to go in order to follow the route or whatever. So...why would this change for LM? It's not against the rules on SRL as Sarcrai said. A speedrun is all about saving time, and beating the game as fast as possible. Without using any cheating or hacking devices of course, and save warping isn't hacking or cheating. This is just my opinion though...I'm not speedrunning this game currently, but will be learning it in the following days.