I am trying hard to remember the song of healing now.... it was one of those with 3 repeated notes wasn't it?... but I can't bring it to mind.
I do vaguely remember the chillingly sad sounds made around the bit that you learn the 5th of the coloured songs (purple note on the menu screen) the one that calls the 4 giants.
Oh and off topic, but while I am here.... which idiot designed the Goron maze thing in the final levels.... that was stupidly difficult... so much so that when I died in the battle against the mask and had to do it again I didn't bother getting the fierce deity mask again. (which made the final battle harder, so I almost died again)... and there is no way I am even attempting to try for the heart piece in there.
Yep, The full song:
And the song you're referring to is the Oath to Order.
I always loved MM's soundtrack many of the tunes stood out to me from the rest of the Zelda series, in a good way. The songs always helped capture a mood of a certain moment in the game, like the final day and calling of the giants. Don't forget Majora's incarnation, that battle was crazy, lol. :P