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Sounds about right in your world of concept and theirs. The Aztecs had to perform human sacrifices every day so that entity would again spit out the sun every morning. Even if that is bunk (the reason was they had to feed negative energy to the Moloch artificial sun object so it kept burning) the symbolism does the job in this context. Touching the sun with the sword was a way to baptise it in fire, when it emerges on the other side it's pure. You can also do this using your solar plexus which equals the sun if its opened enough. I tried it with my dagger earlier.
But anon with Excalibur probably has to use the big sun out there because he's working on the industrial scale.