Roses are red, blood is too…

This just arrived from Mythic today:

Roses are Red,
Violence is too,
On the Night of Murder,
I’ll be coming for you.

mythic-postcard

Speculate away. I’ve got a work deadline to meet.

OOPS EDIT — the combo on the back is 2/13 with something that looks like a pound sign underneath — probably a T though?