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Some idea of how to start making a character, that uses sword, like the behavior of the sword, or white weapons (angle and attack), of games "forager", "enter the gungeon", "nuclear throne"...
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That's a pretty broad question, but I would suggest taking a look at the Los behavior, and the ray casting feature.
Have you completed the Beginner's Guide tutorial? It doesnt deal with swords, but I think it would give you a good starting point.