A Deathly Merritt

On guard ! To and fro, so on and so forth with my dagger.
The ways of waves of blade bade graves saved for my opponents. 
Peer into pierced pieces
Steel that steals the flesh 
Near me dearly do you dare
dismal tip that dips and tares 
Rips and snares, will you wear it ?
a deathly merritt made for the arrant.