Not about vengeance realized, but vowed, is the wonderful last verse from Lord Randel, best sung throwing back the head and howling in minor tones:

What do ye leave your sweetheart, my son? What do you leave her, my pretty young one?
A rooooope from Heeeellllllll to HANG herrrrrr! (2x)
Ah, make my bed soon, for I'm sick to the heart
And I faiiiiin would lie dooooooooon...... (gasp)

(He dies).