Danger, the boss battle theme. Fast-paced, segues from fast to dangerous to victorious to slow and about to burst and back again, and really gets a person's blood racing.
The Oracle, used for the Dark Lich battle. Starts out with three ominous gongs and just gets creepier from there. Fun trivia: most of the sound from the song comes from the Indonesia chanting called Kecak. Kecak is comprised of 5 different groups chanting in different patterns in unison, which gives it its unique sound. And true to this form, 5 sound channels out of eight on the SNES audio chip are dedicated to the chanting.
Meridian Dance. The final boss music. Words do not do it justice, just listen.