Next phrases all have an answer to them and all answers are related to each other, good luck!
they sail they drink and treasure is what they hanker,
But don't annoy them or they will f*** you with an anchor.
For history don't look far
as it is everything you want to learn about war.
known by a lot not to be seen
As batman would not be so keen.
I do not wish for something during the day
As hope is all that I will pay.
When everybody dies
The apocalypse will rise.
The biggest hint actually comes from @Jannis being batmetal
- (format is a bit odd, couldn't let the lines start on a new line in invisible block quotes... maybe someone can fix this :) ?)
Adventures of different dimensionCome together in a place where time is of no mention.
One who cannot feelPut them through tests unreal.
While this is all a hassleOne thing lies ahead, the electric castle
EDIT: Only number 3 is still not found.
Final hint to find number 3:
As time ticks at the klok to awakenThe metal apocalypse is forsaken