What is Xsyon? Can someone describe it more?

[Thundercraft]

About a year ago I added Xsyon to my Steam wishlist. Recently, I've reconsidered a purchase. However, there is only one video on the Steam store page. And neither the Steam description nor the official website About pages were able to answer my questions.

The Steam video says Xsyon is an "alternate reality fantasy, where the history, legends and myths of the real world come to life." Does this mean that it has story elements resembling Earth's mythology and legends (besides references to Earth deities, that is)?

The video says that "players are not only the adventurers" but also the dungeon masters, monsters, quest givers, merchants and several other things. Can players give quests to each other? Are there quests from NPCs? (Does Xsyon even have NPCs, beyond the creatures and (possibly) deities?) Is the notion of players possibly being "monsters" literal or figurative? Can players really take on the role of a dungeon master, or is that speaking figuratively?

The story or mythology hints at benevolent gods as well as a choice of joining the forces of justice that fight against the chaos or the side of evil that want to destroy the world. Currently, are there gods in-game that the player can appeal to for blessings or other benefits? (Or is it a planned feature for later?) Can one's deity be called upon to help smite an enemy tribe? Is there a choice between law and chaos or something similar? Maybe an option to conspire with agents of destruction for... some sort of benefit?

The description talks of a rift that opened and "strange creatures" that appeared. Are these creatures rather alien-looking? Are they all extremely similar to Earth creatures, merely with extra horns or other features? Or do they closely resemble those of mythology, such as grendels, griffons and harpies? (I really wish the Steam store page showed more video or images of the creatures.)

Mostly, I wonder if this is just a typical medieval-style survival sandbox - or if it has more to do (like actual quests to fulfill) and fantasy elements like fantasy creatures and magic. Is there magic, such as spells or potions?

I did notice that Xsyon's last update was in late July of 2018, so that is encouraging. But the fact that Xsyon has only 200 reviews on Steam and has a "Mixed" rating gives me pause. Some of the reviews complain about things like: "population is incredibly low", abandoned characters have turned into hostile revenants that will easily murder you, or that the game requires tremendous grinding. Are these fair criticisms for the current version? Is it based on an older version? Is there an active community?

Finally, I noticed that some have complained about a lack of a Single Player mode or the ability to set up a dedicated server. If Xyson had such features I would feel much less hesitant to buy.

Edit:
There is a forum topic titled "XSYON features explained in Youtube videos!" However, I could not get that link to work, so I could not watch the videos. (Translating the page from German, it reads, "Unfortunately you are denied access to this site. You do not have the necessary access rights to access this page.")