Say hello to your little friend.

This is what a true Sentry feels like, something powerful with subroutines you cannot allow to fire, and at 0 influence how could you not justify its inclusion? (Unless you intend on being a poor corp.) 7 rez cost to 5 strength is fair, and with two subroutines being a trace of 5 and 4 respectively, each with good effects, hell yes.

Trace dependency always comes at a cost, but their respective trace strengths will impose more of a tax to the Runner as opposed to a blanket effect. What gets overlooked with Tracer ICE is that it plays mind games with a Runner, forcing them to consider spending their money just to get through this one time, or even allowing the net damage trace to fire. Overall you're looking at a solid piece of ICE that Anarchs without Datasucker are going to loathe, especially as it'll take 4 cards with Faust to break. This is a serious inclusion to most decks that can support the costs and will see a lot of inclusions in the future.

One of the highest strenght sentry in the game. But how does it compare to other sentries? Badly I'm afraid.

Each faction has a similar or higher strenght sentry that will do more than Assassin. NBN has F2P, Weyland has Trebuchet, Jinteki has Anansi and Haas-Bioroid has Bloop. Paying 7 for a 2 subs sentry, even with 5 strenght, feels bad.

So unless you want to have a lot of high strenght sentries in your deck, then Assassin is seldom warranted. Of course, if you are playing Improved Tracers, then it might be worth it, since it cost no influence and only Sherlock 2.0 and Trebuchet are tracer ices that could benefit from that agenda.

Beautiful and evocative ice, with a nice piece of lore (or quote) going along with it. Amazing job!