Who are the Outworlders?
The Outworlders are from the eastern continent, characterized by their bluish overtones. (Why are they blue? I have no idea; the only thing I can think of is mass colloidal silver poisoning!) The Outworlders love to fight - enjoying the greatest success in military history - and their perceptions of the world are viewed as bizarre.
The Outworlder Religion
Shior Ah and the Ancestors of Nature-
The Outworlders do not worship their God, Shior Ah, but demonstrate their piety through practicing his virtues. Shior Ah himself is said to have made the world, but remains an observer.
The celestial and terrestrial spirits of nature (Ancestors of Nature) are revered, however, and are said to be very wrathful if conservation is not respected. Thus, the Outworlders have traditionally looked down upon gross technological progression and urban development.
Through the use of psychoactive plants combined with meditation, great warriors, tribal leaders, and shamans enter the realm of the Ancestors of Nature and commune with them. If the Ancestor believes that a mortal is not yet worthy to accept its wisdom and power, it will command them to go on their medicine walk: a long, arduous, and sometimes dangerous journey of self-awareness.
Forerunners of the Tribes -
Paragons of Shior Ah's wisdom are said to have wielded the "Sword of Beauty" (a metaphor, but oft misinterpreted as an actual weapon and symbol of legitimacy), and have been given the status of Guardian (saints). These guardians are believed to have been given divine appointment to protect the balance of forces and to promote strength and the conservation of nature.
Te Kayon Din -
As opposed to their western counterparts, the Outworlders believe that Heaven is a state of perfect mental and physical attainment rather than a paradise or spiritual realm; immortality achieved through endeavor. Meditation is referred to as “Walking through the Jaded Threshold (The Gates of Heaven)”. These practices, referred to as Te Kayon Din, are defined as "The process of attaining truth through mastery".
Divinity of the Tribes
Each legitimate tribe - one that can directly trace itself back to its founding Guardian patriarch or matriarch, or any existing tribe that has preceded the Guardians - has a divine right to sovereignty, and any entity that violates this divine right, whether another tribe or foreign power, is the enemy of all tribes (thus, the cooperation of many tribes commanded fear-inspiring magnitudes of military might). Squabbles between tribes, however, are denied the right to warfare, and must be settled either through mediation or duel (subterfuge was often utilized instead).
Foreign powers are recognized as sovereign so long as they don't invoke the wrath of the Ancestors of Nature or promote outright imperialism. (The Outworlder tribes made many enemies as a result. Ironically, the Outworlders assimilated their defeated enemies.)
The Old Masters
Outworlder organization and religious practices gave birth to highly institutionalized, effective, and advanced systems of martial arts. Powerful and sagacious exponents of these martial arts were called "Old Masters" and are said to be the exalted beneficiaries of the Ancestors of Nature because of their invulnerability in combat.
The Old Masters guarded their secrets with utmost ferocity, and typically dueled amongst themselves in order to obtain the others' knowledge. Over time, some of this knowledge managed to leak out into Outworlder-influenced cultures and spread from there. In post-modern times, Masters (albeit rare), may come from anywhere.