Content warnings for the story as a whole: smut, gore, extreme fetishes, trauma, teratophilia, girl's love, questionable consent, and futa girls. More will be added as needed.
Skip if you want to avoid minor spoilers. Now, onto the actual glossary!
Atmaria: The world the story takes place in, a world of monsters and magic governed by a pantheon of gods and the World System.
Siris: The main character of the story, used to be from Earth but died in a horrific yet classic fashion due to some gods meddling in her life. Was granted the blessings of all four gods that caused her death and reincarnated into Atmaria. No longer human, she is now a futanari Siren.
Siren: A race of humanoids that went extinct before there could ever be legends about them, and as such forgotten by everyone except the gods. Mostly human in appearance, they have large bird-like wings and scaled reptilian tails in addition to slit-pupiled eyes in a wide range of colors. With an average height of seven feet and significantly more resilient than their initial appearance suggests, sirens are capable of feats human biology makes impossible.
World System: A massive magical construct that spans the world of Atmaria, created by the gods millions of years ago but has since become its own entity. Allows for the acquisition and use of skills and various other effects. Googlᴇ search 𝗇𝗈𝗏𝖾𝗅✦𝖿𝗂𝗋𝖾✦𝗇𝖾𝗍
The Pantheon: The gathering of gods that manage and oversee the world of Atmaria, often referred to as the Overseers. Major gods include: War, Life, Justice, Magic, Light, Shadow, and Death.
Blessings: A gift or boon given to a favored mortal by a god or goddess, it imparts an ability or effect dependent on the god's domain and intent.
Skills: Supernatural abilities used with the World System's assistance or guidance, skills can be gained via training or other means such as classes. Often requires mana or stamina to use.
Traits: Inborn abilities unique to a race, traits are gained at birth or through special circumstances. Traits function through biology, thus (usually) requiring no mana to use.
Mana: A source of energy that permeates the world, living beings slowly absorb and store ambient mana for use as their own. Used for a wide variety of things, including spellcasting and enchanting.
Primordials: Creatures that are so ancient and powerful they make the gods look young in comparison. Primordials spend the vast majority of their time sleeping in hidden lairs, but when roused often cause natural disasters and reshape continents.
The Reborn: Any sapient creature revived through godly or other magic into Atmaria. They are often seen as heralds of change and progress due to the ideas they bring with them. However, often they simply want to be left alone and others force them into innovation. There is no visible indicator if someone is Reborn.
Legacy: A hereditary style of magic passed down through generations of a family, this magic is entirely unique to the bloodline. Legacy holders are marked by a unique tattoo somewhere on their body. This is not a reliable way to identify them however as tattoos are a popular cosmetic as well.
Dungeon: A dungeon is an extradimensional space accessed through a natural entrance of some kind. These subspaces are often filled with traps and monsters, however great treasures await those brave enough to delve into them. Dungeons often take on a ‘theme’ based on their environment and what aspected mana they absorbed while forming.
And that concludes the glossary for the initial chapters! Anything new will be added to a future glossary page. Now enjoy the story :3