Magus spends his whole adult life wanting to get revenge on Lavos. He tries to summon it in the Middle Ages, but the party interferes. Once he gets back to 12,000 B.C. in Zeal, he finally confronts Lavos and attacks it.
MAGUS: I won't... be beaten!
I survived the darkness to defeat you, Lavos!
Take this, Lavos!
Aaaugh!
I've always thought Magus had to have a strategy for defeating Lavos, something of a trump card that he could use against such a powerful being. The technique we see him use seems be physical, as he slashes Lavos' head with his scythe. A blue light then appears behind the head and whole shell flashes red, but it seems to have no effect.
MAGUS: Wh, what..?
It doesn't work?!
Aaughhh!!
What was Magus trying to do? Why did it fail?