We’ve seen Wind Rasengans and Magnet Rasengans. A lot of other elemental Rasengans would make a lot of sense, like Lightning Rasengans, Fire Rasengans, Lava Rasengans, and so on. But what Rasengans would be really weird? In my opinion, something like an Earth Rasengan would be the weirdest, because the Rasengan isn’t a solid, yet solidity is a key factor in most Earth Release techniques. Maybe a Rasengan that’s very heavy in nature, like earth, that adds to its lethality? A Wood Rasengan would also be bizzare to many people, and I can understand, but I came up with a Rasengan that maybe drains the opponents chakra and transfers it to the caster? Wood Release has been shown to be able to drain chakra, so it’s not that far off. I mean the Magnet Rasengan doesn’t actually involve magnetism or iron sand, it involves curses seals. Feel free to share your thoughts.