Ki

Ki, also called inner power or inner energy, was a mystical energy of the body that could be used to fuel various powers by its practitioners. It was commonly used in Kara-Tur.

Training
The use of ki was aided significantly by intense training of the mind and self-contemplation. With this, a practitioner could focus their ki by concentrating on their breathing and directing their bodily energy to produce a specific ki power.

The Do Jang of Won Kwang, a military academy in Koryo, taught its students techniques for enhancing and focusing ki. Students regularly spent hours each day working to focus their ki.

Ki Powers
At its most basic, a bushi or samurai could give a fierce "kiai", a ki shout that boosted their fighting ability or strength, while a kensei could make a devastating attack. A sohei could focus ki to fight in a fanatic frenzy, even using their ki to sustain their lives as they fought to or even past the point of death. Even the low yakuza could use ki to sense and anticipate a foe's action and narrowly evade it.

Focused ki enabled a practitioner to achieve great acts of endurance. It was said they could ignore the touch of hot coals or the bite of chill wind, live without food and drink for three times longer than normal, live in a harsh desert, and survive any catastrophe. Some martial artists could channel inner power to make their bodies as light as a feather, and so leap to great heights and distances, and even change direction midair. Others could channel inner energy into their hands and fingers, so that even a gentle push could deliver a great impact, even without touching at all.

In more advanced applications, a monk or shukenja could resist the impact or harm of magic or other attack or heal an injury, while a ninja could hold their breath for long periods, walk on water, and even pass through walls. A wu jen could focus ki to improve reactions and even summon considerable magical energy with which to cast a spell.

However, ki was a finite resource: a practitioner might have limited uses a day or not be able to use their greatest ki powers if they had already used their lesser ki powers that day. The greatest ki powers exhausted one's inner strength. A nin-chu-ju-gaki, a starving spirit, drained the key attribute of its victims, which blocked their use of ki until they recovered.

Practitioners
The following paths were known for their use of ki powers, to a greater or lesser extent:
 * Bushi
 * Kensei
 * Monk
 * Ninja
 * Samurai
 * Shukenja
 * Sohei
 * Wu jen
 * Yakuza

Soft martial arts styles used inner power to provide energy and overcome an opponent and were usually defensively minded. Some martial arts made particular use of ki:
 * The Northern Fist School "read" an opponent's ki in order to make stunning or killing attacks at weak body parts and acupressure points.
 * The Southern Star School believed ki to be as dangerous as a physical attack and thus concentrated ki beyond the point of impact, permitting them to strike a target without touching it.
 * Tae kwon do taught at the Do Jang of Won Kwang employed focused ki for great endurance.

Spells
The aiming at the target spell for wu jen combined ki power, magic, and meditation. With precise breathing exercises and clearing and calming the mind, the spell was cast. It permitted the wu jen to perform other actions, even cast aiming at the target, without breaking concentration on an existing spell.

Items
Of the magical cards of the Edu'sascar, "Ki", the symbol of the Power Within, could be used by a monk or shukenja to boost the ki powers of a congregation for a brief time.

An opal warfu stone could double one's ki power.