It was a cruel twist of fate, how often they had to work with one another. Their first encounter was on the same military spec ops squad. There, they got the codenames that stuck with them forever. Nightshade. Moss. Years later, they went AWOL around the same time. Found themselves under the same shady employer. Neither of them liked it but thankfully they weren't forced to work the same jobs together. Nightshade might've shot the smug bastard if that was the case.
And then it happened. Enemies permanently. Nightshade went AWOL, making an enemy of his employer. It wasn't heartbreak for Moss, however. It just meant a worthy prey was finally on the market. It only took the illusive assassin decades to show his face. Took capturing something precious to force him out into the open. Moss counted the seconds leading up to their inevitable reunion. So did Nightshade.
One way or another, they were going to end this bitter animosity. One of them was going to die. Nightshade hoped having something to live for would give him the advantage...