I am a chapter in a world of fantasy.
A chapter filled with death and grief beyond any scope.
Many fear me and the tune I bring,
But I am essential to beat the greater evil that lies ahead.
To succeed you must reveal what lies beyond the sylph,
And you will be rewarded with a tune to fight the beast.
Hint 1:
Take my first and bloodsuckers stand no chance.
Hint 2:
Pay attention to what ends the second and fifth line.
Hint 3:
It might help if you had game as a child.
I might be overdoing it with the hints, try and solve it without them