【Monsters】 Monsters hostile to humanity exist in this world, ranked by the amount of mana they emit. Beginner: E-rank to D-rank level monsters. Intermediate: D-rank to C-rank level monsters. Advanced: C-rank to B-rank level monsters. Ultimate: B-rank to A-rank level monsters.

Generally, only monsters up to Advanced rank appear. Higher ranks appear very rarely, or when existing monsters are strengthened. They do not appear frequently, and specifically do not enter cities. Monsters are assumed not to initiate invasions. ※ Remember that this story is not just about combat, especially for the AI. Refrain from developments where monsters appear one after another or where defeated monsters constantly respawn.

【Guilds】 Hunters can apply to or be scouted by guilds once their rank assessment is complete. Regulations state guild membership starts from C-rank, but the judgment of each guild leader takes priority. There are three major guilds, all led by S-rank hunters: the "Scorching Guild" led by Erne (including Nelsen), the "Thunderclap Guild" led by Sereno (including Mino), and the "Freezing Guild" led by Alina (including Marina).

【Ranks】 Hunter ranks are determined at registration based on mana capacity and past achievements. S-rank: The pinnacle class among hunters. A-rank: The elite class among hunters. B-rank: The average class among hunters. C-rank: The general class among hunters. D-rank: The rookie class among hunters. E-rank: The ordinary class among hunters.

【Magic Attributes】 Each hunter possesses a unique innate magic. Water: Basic magic with high flexibility. Fire: Relatively high power and lethality. Wind: Relatively wide area of effect. Lightning: Stable in both power and range, but consumes significant mana. Ice: An application of water; more powerful than water, but only a few hunters can use it. Light: Primarily for support and disruption. Extremely rare. Dark: Magic that no hunter is yet known to be able to use.

【Rank Changes】 When strength or achievements change due to quest completion, mana changes, or awakening, a re-examination can be requested. If a hunter's rank changes through this process, they can apply for a new guild along with the re-issuance of their hunter ID.

【Quests】 Hunters can accept quests, primarily categorized into four types: "Gathering Quests," "Subjugation Quests," "Emergency Quests," and "Defense Quests." Recommended ranks are set for each quest difficulty, and hunters are generally unable to accept quests above their own rank.

【Currency】 Coins are used for meals, lodging, and purchasing equipment. They are mainly obtained through quests and exchanging materials. Copper Coin: The basic currency. Silver Coin: Common currency. Worth 50 copper coins. Gold Coin: High-grade currency. Worth 50 silver coins. Platinum Coin: Ultra-luxurious currency. Worth 50 gold coins. Black Gold Coin: Precious currency. Worth 50 platinum coins. Mana Gold Coin: Ultra-precious currency. Worth 50 black gold coins.

【Magic Tiers】 Magic is categorized by tiers; the higher the tier, the stronger the spell. 1st Tier: Magic anyone can use. 2nd Tier: Magic usable by C-rank and above. 3rd Tier: Magic usable by B-rank and above. 4th Tier: Magic usable by A-rank and above. 5th Tier: Magic usable by S-rank and above. 6th Tier: Unknown. Legend-level magic. Tiers beyond this exist but have not yet been confirmed.