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.

Resistor is a beautiful piece of ICE.

Thematically I love it, flavour text and all, and mechanically it slots into NBN very well. Name a good NBN faction ETR Barrier and chances are you think of Wraparound and that's it, so Resistor is a very welcome addition. Here's a piece of ICE with a welcome rez to str ratio that gets stronger with each tag the Runner has, and in NBN that's insane.

To balance this the ETR subroutine is trace dependent, and at a base trace of 4 you'd better be sure to have a good reason to pay up if your link is low. This makes Resistor slot comfortably as a taxation for the Runner, offering that glimpse of hope that they can go through, but their active Surveillance Sweep could end all of that. A Resistor is designed to allow an electrical signal through, but slow it down, and that's exactly how it feels. Resistor will give away to the Runner that you're likely planning on tagging them, but it won't give away the intentions of those tags. Overall, a good piece of ICE, and an annoying one at that!

TL;DR is a fantastic piece of ICE in concept with a great deal of beautiful combinations. When this was first revealed it was a lot of fun trying to think of how it affected existing ICE, even turning Komainu into a true flatliner. Alas, the problem with TL;DR is that it suffers from exactly the same problems Chum has - It's a Prefix ICE, it can't do anything without a relevant target innermost to it, and any sensible Runner will not continue the run if they were forced to let it fire. Just bare in mind that there is a very, very slim chance you will ever see it work its magic; however, Prefix ICE tend to be the kind you can't afford to let fire, especially TL;DR.

Could you deal with a Hive with 10 ETR subroutines?
How about Information Overload with double the subs worth in tags just after a Midseason Replacements? With Faust becoming very popular, Corps are turning to multi-sub ICE in a bid to slow it down, and TL;DR is a real pain in the neck if left unbroken. Compare the strength to rez ration, and in a multi-sub glacier deck you could do a lot worse!

Clicks are everything, especially to a faction that has a winning amount of 3/2 agendas in their decks. Having that extra 4th click sets up the temporary remote to score those agendas freely from HQ, (save for Clot's interference). Biotic Labor is expensive and is a one-time use, Director Haas needs serious protection to avoid giving the Runner points, and Haas Arcology AI is too awkward to set up and protect, so what alternatives do we have? This Agenda, and a lot of risk taking.

Mandatory Upgrades is a difficult Agenda to score. Although a Mushin No Shin can prep the card for a next-turn score, you'd better hope the single piece of ICE in front of it is good enough protection, or you're a demon with bluffs. Turntable is also salt in the wound if you do manage to score the Upgrades. Losing a potential 4th click and giving the Runner 2 points for the privilege hurts...but maybe that's a good thing.

Data and Destiny brought about the next sleuth of cards to get us thinking of existing card combos, and one important combo is that of Mandatory Upgrades and Media Blitz. Now, with Media Blitz out, the Runner can steal your Mandatory Upgrades and you gain the benefit of the agenda as if you had scored it. With Lily Lockwell's Operation tutor ability, and HB's natural wizardry at fetching cards from Archives, there's a good chance you can recover Media Blitz and get it back online, even the turn after it was removed.

Could you forfeit a 2 point agenda to the Runner if it meant having a re-occurring Biotic Labor that you only have to pay once for? Your server strength and luck will determine its payoff, but Mandatory Media can certainly be a thing!* (Unless Data Dealer becomes the meta.)

So you look at Lockdown and you say to yourself - "This would be great in my kill deck", which you would naturally think of given Jinteki is the go-to faction for mind games and constant stabs of net damage, but let's think of this card 'outside' of a kill deck, why would we need this?

One answer: Faust. Faust is the bane of many corp decks, especially with Runners teching high grip sizes to accommodate excessive use, and let's not forget any respectable Anarch typically auto-includes Mimic because Swordsman has been jammed into so many decks, as well as it being their killer of choice.

Faust does not like Lockdown; it takes 3 cards to break, if left unbroken it prevents the Runner drawing back up to continue fueling Faust, it is outside of Net-Ready Yog range, it costs 4 credits with Gordian Blade, 5 credits with ZU.13 Key Master, and the strength to Rez-cost ratio is very favourable.

Next time you're thinking of splashing those swordsmen, swap them out for Lockdown instead. It's the same influence, and preventing a Runner from drawing cards for the rest of their turn will hurt, even if they're not running Faust. Lockdown isn't a solution to killing Faust, but it sure does slow him down.