The speaker in the song lives under an evil, oppressive ruler and wants to overthrow him and become king. To do this, he masters five magics but in doing so, he becomes power-hungry and evil, just like the Abyss Lord that he opposes. Furthermore, the Abyss Lord already knows the five magics so he has the advantage and wins the fight. This is the only Megadeth song that's real fantasy-adventure oriented.
Kyle - Montreal, Canada