WRITING PEN - my name's penned down by blood into the book of life; Jesus did it all

I purchase biros by rolls 'coz I source pens for suspense;

This is a hand, writing down the right thing,

Freed from the law of sin as ruled by the court of grace;
My case was critical but now transparent-crystal clear;
Through it I can see that His blood is the ink

Flowing through straws of veins like bullets from a cartridge,
The tip of his mouth kissed the page of my life
To blot out my name from the paper of paupers;
Marks of red from not a red but a blood pen
To pen down my name into the book of life,
He's a crown to my head and a covering to my mouth,
With the ink of blood fully spilled, he said,'It is finished'.