Here’s the magic system for the final kingdom mentioned in Loyalty Fallen: Hirahja. Hirahja, which some snobs call the Barbarian Kingdom, is the only country that does not use gems in its magic.

Fundamentals: 

• Core Element: Iron
• Characteristics: Heavy, slow, cumbersome, unbreakable, and incredibly powerful for combat.

Source and Catalyst:

• Material Catalyst: Iron, believed to be bestowed by the mythical Iron Dragon, serves as the catalyst for magic, turning to dust after use.
• Mythological Origin: The Iron Dragon is a central figure in Hirahjan mythology, representing the source and inspiration for their iron magic.

Usage:

• Daily Life and Combat: Iron magic is integral to daily life, aiding in hunting, shelter construction, and especially in combat through weight-manipulation techniques.
• Weaponry and Shelter: Manipulation of iron to dynamically change its shape for creating weapons, shelters, and tools.
• Centuries in the future, iron would be used to create autonomous machines, and Hirahja would leap to the forefront of the world. 

Practitioners:

• General Populace: Nearly everyone in Hirahja has some affinity for iron magic, making it a communal practice.
• Shamans: Claim to use iron magic for healing, though such claims are not substantiated.

Societal Integration:

• Tribal Knowledge: Iron magic is transmitted through tribal knowledge, apprenticeships, schools, and communal events, deeply ingrained in Hirahjan culture.
• Conflict and Trade: Chiefs fight over iron-rich areas, but iron magic also facilitates fur trade through the creation of sleds and transportation methods.

Limitations:

• No Known Limitations: Unique among the kingdoms, Hirahja’s magic system lacks limitations, consequences, or taboos, with iron being in plentiful supply.

Geographical and Historical Influences:

• Combat Focus: The kingdom’s history of constant conflict and the Battle of the Southern Pass highlight iron magic’s combat potential, shaping its development towards warfare and mechanization.

Inter-Kingdom Relations:

• Perception: Viewed as clunky and primitive by other kingdoms, Hirahja’s iron magic is not in high demand externally.

Magical Fauna:

• Iron Dragon: A creature with blue flame breath, melting and armoring itself with iron, revered and feared in Hirahjan mythology. Chiefs fight it to avoid a natural death. 
• Snow Owl: A common yet formidable predator large enough to carry off a man, known for attacking villages in hordes.

Defensive and Offensive Capabilities:

• Final Blow Technique: Chiefs demonstrate their prowess with the devastating weight-manipulation technique in duels and ceremonies.
• Weapon Manipulation: While possible, the slow and cumbersome nature of iron magic makes real-time weapon manipulation less effective in combat.