"White Death"
Reasons:

-The term was used to describe Simo "Simuna" Häyhä, a Finnish sniper who was so well known during his time, serving in the winter war and killing around 505 soldiers, the highest recorded in any war, with an average of 5 people a day. The soviet even arranged missions in an attempt to kill him, with artillery strikes and counter-snipers to no avail.

-He shoots Russians. 'Nuf said.

Thanks for reading! I wanted to make an AWP of this theme and give it this name, but turns out you were a step ahead XD