How about "O Fortuna", a classical piece that was used as the theme for the film Excalibur, and is now used as background music "when anything badass is going on", according to kickassclassical.

Here are the lyrics to the first verse:

O Fortune,
like the moon
you are changeable,
always waxing
or waning;
hateful life
first oppresses
and then soothes
as fancy takes it;
poverty
and power
it melts them like ice.

The orginal Latin scans better:

O Fortuna
velut luna
statu variabilis,
semper crescis
aut decrescis;
vita detestabilis
nunc obdurat
et tunc curat
ludo mentis aciem,
egestatem,
potestatem
dissolvit ut glaciem.