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This is an electric arc effect using geo nodes, which is a derivative version of this video from Motion Dreams. There are 2 Blender files in the rar archive, one of which contains an electric arc object labeled as an asset, so you can save it in a designated resource folder for use in the Asset Browser that has the tag “electric arc”. The other file is a sample or example file, which is the scene used in the video above. Translated with DeepL.com (free version)