From the album 'Phase 3-Thrones and Dominions'

It's mainly the same riff over and over again.

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-10-10-10/5-5-5-5/3-3-3/10-10-10------------|
-10-10-10/5-5-5-5/3-3-3/10-10-10------------|

After playing this a few times, try experimenting with the riff, just like in the song.
Enjoy!