Hello OP, and thanks Acro for the friendly words!
The ‹Nightborne› are indeed more of a community than a guild. Informations about our events and what they involve can largely be found on the argent archives’ link Acrona kindly posted: we focus on high fantasy events like artifact hunts, dungeon crawls and treasure hunts, and then some social events or casual RP. If you’re interested or just want to know more, feel free to hit me up in-game.
If instead you’re looking for a Horde guild, one that provides weekly events, I heartily recommend checking the Horde server discord, the one called Horde AD RP Community. You will find plenty of Horde guilds over there that have either an elven theme, an artifact hunt theme, or even just a more generic adventurer guild that might welcome all kinds of members of the Horde.
I also see some of these guilds on the forums so I will post them here.
I have heard good things about (but have not yet interacted with) the Eclipseborne! They are an official military group of blood elves and nightborne whose main goal is to fight threats to the kingdom of Quel’Thalas, especially the Void. Here a link to their thread: [H-RP] Eclipseborne - Argent Dawn - World of Warcraft Forums
I have interacted in the past with a military guild who, as per their thread, focuses on “plundering, exploring, killing in the name of the Horde and its allies”. They have a more tribal vibe, but definitely welcome all (Horde) elves in, and have a very laid-back and friendly OOC approach. Check out the Grimtusk Warband:
[H-RP] Grimtusk Offensive - Argent Dawn - World of Warcraft Forums
Also another guild I have not interacted with, but to me looks like they’re nice people, is the Far Reach, which focuses on artifact gathering and research for the Horde (a theme an elf might be interested in). [H-RP] The Far Reach - Horde Military Artefact Hunting Unit - Argent Dawn - World of Warcraft Forums
What else? I have heard there are a couple of events about to come in Silvermoon, but I am not sure if the organizers want me to post them on the forums, so I will first and foremost double-check with them. Still, I recommend to enter the Horde’s RP discord server, where a lot of informations are advertised.