To learn Petra - (On Fire Album Version) Mine Field chords, grasp the musical fabric of the song with this sequence - Ab, Eb, Bb, Ab, Eb, Cm, Ab, F and Cm of chords. For a smooth transition, initiate your practice at 48 BPM and gradually match the song's pace of 96 BPM. Set the capo considering your vocal range and favored chords, aligned with the key: Eb Major.