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im not gonna put it in the hashtag but-
Crom came from Crom Faeyr, a legendary weapon in Baldur's Gate 2. I used to go by Crom Faeyr for an elf persona, but it got too popular as a user name and so I just shortened it to Crom. I started kinda associating it with the Conan Crom as well when someone pointed it out (for some reason I'd never put it together)
The reason I adopted it was because I thought the weapon was the coolest in the game and loved using it
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I've always really identified with "wield me and I'll grant you strength", a thought I came up with a while back because the weapon grants its user 25 (max value) strength when you use it.