New Domain (Located on Seirai Island near Fort Hiraumi)
DISCLAIMER: This post is based off their subjective experience. If any personal opinions are stated in the post, please do not consider them as fact.
This is a new artifact domain. Right now, there are only placeholders and the inside looks like the Momiji domain, but I expect that to change soon. The artifacts should be the new ones meant for Itto and Kokomi (at least, that's what I think; I'm not sure). Note: This has happened previously where artifacts aren't in the beta and placeholders are used so this will be the domain for the new artifacts
The highest level consists of several Rifthounds. There are five Thundercraven Rifthound Whelps in the beginning, followed by two more that spawn later, one Mitachurl, and one normal Thundercraven Rifthound.
The domain is pretty straightforward. The Rifthounds all try to attack you at once, so they're quite easy to group without use of CC. However, do be wary of corrosion and bring a healer if the corrosion is too much. There are no surprises in this domain, especially if you've already fought Rifthounds before.
The leyline disorder favours Electro. Electro dmg is increased and Electro attacks can release a shockwave.
As is the case with all beta data, this information is subject to change.