On a new moon, fill a glass with consecrated water, add crushed roses and a pinch of salt. Put the pen in the glass and put the glass where the moon would normally shine directly on it. Burn protection incense, vizualize the pen being charged with a  blue light. Say the following three times.

 

"Ink so (colour) as the (comparation)

Always write with the truth

Three times said

Three times blessed

With the moonlight

Blessed be

Serve me right

Serve only me

So mote it be!"

 

Your pen will be blessed the next day.