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You need to edit a file in the shaderpack for this to work.
Open the shaderpack with 7zip or winrar.
Navigate to the shaders folder and open the item.properties file with a text editor. !A screenshot of where the item.properties file can be found
Press ctrl+f and search for trial_key. !A screenshot of the result when searching for trial_key in the item.properties file
Add netherite_sword behind trial_key seperated by a space. !A screenshot of how the edited file should look like
Save the file.
It ads a glowing effect to the sword without having to modify anything. The effect is however less bright and pronounced.

Replaces the Netherite Sword with Aatrox from League of Legends.