To learn Mägo De Oz - El Lago chords, anchor your practice on these foundational sequence of chords - F, Am, F, G, Am, G and F. I suggest starting at a calm pace of 54 BPM, and as you gain confidence, approach the song's BPM of 108. With C Major as the song's key, tweak the capo to cater to your vocal pitch and chord likes.