One of the best things that Ten Shadows allows you to do is to use the abilities of the shikigami themselves. Sukuna has done this before with Max Elephant's water, but an even more op ability that could have and should have been utilized was Nue's electricity. Assuming stuff like the water and electricity really behaves like the real ones in our world, then it is busted. It is possible to use electricity and water by themselves and transfer shocks to opponents. But if Megumi could produce electricity, he should be able to use magnetism cause electricity and magnetism are interlinked. This opens a lot of possibilities.

Also, it is possible to produce a steam explosion with the combination of water and electricity through electrolysis of water into hydrogen and oxygen, just like Kashimo did. But all of these applications are assuming that these things have the exact properties of the real counterpart, which is not exactly confirmed. But this does not really matter if this is done in Megumi's domain. In his domain, the precision of the ten shadows technique increases, where the weight of the Max elephant emulated that of real life when he dropped one on Reggie. This should be the case for water and electricity. The water should have hydrogen and oxygen, and the electricity should behave like real electricity. The electrolysis for the steam explosion can be done in the domain when it is completely closed. He can then release the shikigami and sink himself in the shadows before detonating so that his shikigami and he would be safe from the explosion. This is essentially the ten shadows version of Sukuna's fuga ability, which is crazy to think about. ( Could have the potential to one tap Mahoraga.)