Phrygian Example: Metallica - Wherever I May Roam

The main riff of this Metallica song uses the E Phrygian mode (this is the same as C Major).

Listen to the YouTube link below to familiarise yourself with the song, especially the main riff.
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https://www.youtube.com/watch?v=UWlSw5Kb0dg

Below is a link to the tablature for 'Wherever I May Roam' on Songsterr.com. Pay special attention to the "Lead Gtr" part (accessed via the Mixer) from bar 13.
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http://www.songsterr.com/a/wsa/metallica-wherever-i-may-roam-guitar-tab-s3707t1