Answer:
Umm, im terrible at this kinda stuff but here my best shot :P
Step-by-step explanation:
Don't be so foolish to think he can die,
Because if you do,
You will be given a reason to cry.
When you least expect,
He will resurrect,
And pain will be brought to you.
Killing the Slenderman is something you should NEVER attempt to do.
Sorry, that was really bad XD. I think i should add songwriting to my list of things to never ever do. lol