I'm assuming you're attempting prose. Let's do some damage control, here.
I won't rewrite it, but lets give some pointers, sentence by agonizing sentence.
Its a key that unlocks there death
First off, 'there' is a place. I believe 'their' is what you're looking for.
but when you open it it unlocks there death
theirIts not to easy but not to hard but,it unlocks there death
Once again, their. Also, misplaced sentence structure. I'll rewrite it, with improved grammar and sentence structure: "It is not too easy, nor too hard, but it unlocks their death."
It will not take long to kill ya
*you.
but in you unlock it,you will die from it nor you will live from it.
Once again, rewrite time: "... but if you unlock it, you will neither live nor die." To add some fun, here: "... but if you unlock it, you will neither live, nor die from its menacing presence."
its like being borned alive but in a more painfull way
This one makes no sense, personally. I'll try and decode. Rewrite once again: "It is like being born again, but more painful than being born the first time."
I'm not really sure how to decode. You don't actually feel being born, and when you're born, you're assumed to be alive. 'Born alive' is a redundant statement.
or like a thousand fire ants biting you all over the place
Metaphor is good, grammar is good. But being Orion, I must add something.
"... or like a thousand fire ants stinging and devouring you."
it will not stop,it will not rest,or even ben cured
Space after commas. Also, space after periods. Anyone with a high resolution will want to kill you if you don't.
*be
Not terrible. No rewrite necessary.
it will not stop intill it has killed of whom it awaken it
I can see some thought, but not really. Rewrite: "It will not stop until it has killed the one whom awakened it."
Until. Until. Until. Please, it's spelled 'until'.
Its a key that unlocks ther death...........
A typo almost made it grammatically correct. Almost . . . .
Rewrite: "It is a key that unlocks their death . . . ."
Sorry for being a condescending, arrogant, prick of a Grammar Nazi, but you need it.