Vikeltic #1696

Hey everyone ! I am looking to engrave a new sword and was looking to translate to Sindarin the following phrase:

•I am called Natural Death - For a stab through the heart quite naturally ends one's life.•

Having some trouble translating by myself as i am quite new at this.
Can anyone help with a possible translation ?

Also, would "i eneth nîn Gûr - lasta nín glîr" be a good translation of " My name is Death - listen to my song"

How would the correct translation look in tengwar ?

Appreciate any help !