I think you should create unique listener gear that is rewarded to them upon the time where all your quests in the Black Hand quest line are completed. I also think you should make a spell that makes it possible to deploy a decoy as a distraction to guards, just a few suggestions i will think of all i can.

@ sandbog
I'm planning to make an unique black hand gear for the five members of the black hand, sry that was a little spoiler. and the listener gear while a littl different. I have made a really cool design for it. I'm also going to make a cooler standard DB armour since I don't like the vanilla.
hmm I have some idea about ways to make a spell like thaty you want, a decoy spell. it is a really good idea, thank you.

no prob, i would be making mods like this myself but i am not as talented as you or anyone else for that matter, oh and i agree the vanilla DB armor looks like a jumpsuit lol, when i was first descovering the DB i was just like "wow they are going to be/look so badass," that was up until i saw the armor lol.

Interesting

@ Orlov
how about writing an idea instead of saying intrestingx)

Dark Brotherhood Gloves: double backstab, double crouch attack.

There should be a staff that allows you to summon a poisonous snake for assassinations lol

Linka i have another idea, you should give the player a personal listener sanctuary, that they can customize all on there own

@ minotar685
that would be hard to do, but possible I could make a staff that cause poison damage with maybe a cool effect when it hits a target.

@ sandbog
can you be more precise in what you mean with that?

I mean a personal sanctuary with some servants, and an architect that can customise the sanctuary the way you want it. for example, he could say where do you want to place your enchanting area? and you could say, "place my enchanting area in the main room," or the 3rd room on the right, or in the secret passage area. It all depends on what rooms you would want to include if you did do it.

Howdy, I'm one of the guys who suggested an idea for a quest (Upon the Nostalgia was the working title I believe). Anyways, I shared a google docs file with you and have finally completed it. So just a heads up if this is still a go.

Maybe make some gear like this:
Hood of the All-Hearing: Speech and Archery are increased by 35 points.
Robes of the All-Hearing: Increase Poison resistance (from enemies) and Poison damage (for yourself) by 40 points.
Gloves of the All-Hearing: Backstab damage is doubled and One-Handed damage is increased by 40 points.
Boots of the All-Hearing: Wearer is muffled and moves silently, Sneak increased by 30 points.
The Auditor's Blade: Absorbs 15 Health (to increase damage), Magicka (to refuel your Drain Life if you're a vampire), and Stamina (so they can't escape :evillaugh:)

And maybe make a few spells, too:
The Listener's Focus: Detect all enemies, even Daedra and Dwemer machines.
The Unlistening: A Shout that drains Stamina and staggers the target. Stamina drain increases with every word spoken. The first word is found in the Embassy, the second is found near the Daggerfall Sanctuary, and the third is near the destroyed Sanctuary.

I have no idea if this would be possible but could you make a ranged spell that does poison damage over time, and doesn't immediately alert the target? So you could cast it on someone and then just watch as their life slowly drains from them and they die without being able to suspect a thing before it's too late?