Correct

煞笔

/ shā bǐ /
Strokes

Definition

to stop one's pen/to break off writing/final remarks (at the end of a book or article)

Example

As a Verb

come to a conclusion; write the final line

1
Dào
hái
néng
shā
煞笔
  

I can't very well end here.

As a Noun

concluding remarks of an article; ending of a piece of writing

2
Zhè
piān
sǎnwén
散文
de
shā
煞笔
hěn
jīngcǎi
精彩
  

The concluding remarks of this prose are wonderful.