The whole song is in the key of B minor, so essentially you can play the Bminor scale or Bminor pentatonic over the whole thing.
The chords for the verse:
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---9-----------10-----
---7-----------7------
The chords for the chorus:
G Eminor
G Eminor
G Eminor
G A
Miracle Blade 4: Gibs on touch.