Not a new skill. Just a new activity and kind of fun at that.
Have your carpenter take 15 boards and 2 blight and make a snake charming flute. (They should come out with between 75-99 uses, regardless of whether or not they're exceptional.) Have your miner mine some sand and give it to your alchemist to make some serpent venom vials with a glassblowing pipe. (One sand makes one vial.)
Now head off to Ter Mur in search of silver serpents. (Silver serpents located elsewhere may also work; however, I haven't tried them myself.) Bring the flute(s) and some vials. If you want, also bring along some orange petals.
You can find a silver serpent spawn west of the Royal City out in the boonies a bit, not quite up to the lava area. Or head south until you find the Snake Charmer's house.
Now, use the snake charming flute. You'll get a cursor to target a serpent. Once you do so, you'll need to point to where you want the serpent to move. Sometimes this doesn't work and you'll have to wait a few seconds for the flute to recharge and try again!
Once you've charmed the beast, target it with the vial(s). You'll either succeed or fail to get some venom. You'll probably also be poisoned. However, it's usually only a mild case of poisoning and easily cured. Once in a while, though you may experience a slight twinge of panic, especially if you are using a character not well equipped to handle being poisoned.
Normally, you can only get two vials from a charmed serpent. You may get more as loot once you've killed it. Characters with poisoning skill may end up with more vials from their collection attempts (2-3X more if GM in poisoning).
Kill the serpent after you've had two successful collection attempts. Now go get another one and do it all over again.
Note: As of two days ago, using charming did not seem to affect using the peacemaking skill (i.e., didn't go against the peacemaking skill use timer). I haven't had a chance to try it again since the publish though, so that may have changed. Also, I do not believe you can get venom simply by peacing or paralyzing the serpent and then using the vials. I think it MUST be charmed in order to fill a vial. Additionally, I think you can only charm a serpent once. If you try to do it again, you get the message that someone else is taming that creature. (The whole process, except the actual venom collection step, seems to mirror herding.)
You'll use the silver serpent venom, wine, and clippings from decorative plants to make 5-use bottles of useful dyes in a nice range of colors. (The dye is the same color as the deco plant the clippings came from, unless you've mixed pigments made from clippings of two different colors of plants and used the resulting pigment to make the dye. I believe the available dye colors are all the colors that already exists for deco plants and another 3 or 4 "new" ones from mixing with white or black plants. ) You'll want to experiment to find all the colors AND to find out what you can dye with these new dyes.