Danmachi my way: Volume 1

Ki

Ki, otherly known as life/soul energy, is an element of spiritual being, magical essence, and mana that is connected to all living creatures of the mortal races, so undead or monsters are not included in Ki, and this element is something that enhanced the body of the mortal race to its peak potential in every aspect, such as

enhancing every bodily sense and capability that can enhance premonition to the point of almost predict an opponent's attacks and/or movements, similar to gaining an intuition to predict what happens next, however, this is only from what a person can perceive with their senses, so anything that nullifies or block's that will be able to work around it such as Presence Concealment of any rank, and EX ranked Presence Concealment can actually make this backfire by ridding someone of all there senses entirely, though some can train to not have this happen to them on for situation's like that by relying on there senses in real-time instead

enhance a person's magic, mana, and physical feats to the point where they can seem almost a level above their normal level if they are an adventurer, for the longest time, mortal's of the mortal world would have had to learn to use Ki to enhance their bodied to take on most of the monster's of the mortal world, but with the aid of a Dunamis, hardly many even use this anymore due to them being able to achieve greater mean's of strength with a Dunamis which while still need's effort, is easier to manage and work with overtime, however, it's still worth learning for many benefits it can still provide effective in helping an adventure beat someone a level above them and even 2 level's above them if they are particularly skilled and gifted in their Ki

greatly increasing offensive and defensive capabilities to the point of sending shockwaves through enemies or armor in attacks even moving past defenses to strike an enemy's weak points directly and absorbing the same level and kind of attack's in defense lessening its damage taking hits, hardening one's body to near metal-like toughness to take more hits or even stopping a blade from cutting users skin or even causing a bruise, as well as enhancing bone strength to make one able to have a building fall on top of one and suffer not even a scratch without a Dunamis, and with one, can take hit's from adventurers a level above you and have it do far less damage than otherwise (cut's damage by 20% - 50%)

greatly increases healing, almost like having Regeneration D, however, this still will take a day and medical attention is still recommended as the healing is still limited in some regards, while with a Dunamis, it can heal most small injuries and some cuts and stabs near-instantly automatically, it will still need time for more severe injuries, and some are unable to survive as well, and it doesn't help grow back lost limbs, that is unless you put the limb on ice and seek medical attention within 6 hours

While Ki has no magical capabilities since anybody who trained hard enough can use it, it's something that the Werewolf, Oni, Tanuki, and Kitsune study and practice on a regular basis, in some cases, high Ki user's can even match up to a level 1 if they wanted to, however, when adventurers who mastered Ki are fighting, they are said to perform past what their level should allow them to, thus, Ki users are highly sought after by the gods as this is the loophole to "any and all god's cannot use there divine power's while in the mortal world" rule so the god's such as Athena and Ares lean it for war, and the likes of Artemis and Cernunnos learn ki for hunting, and other's learn if for different reasons, though for god's like Demeter, Vishvakarman, and Hestia have no real use of Ki (only 5% of any god's who are in the mortal world even use Ki, and their other's don't see the point)

Ki can be increased with more Mana, so Ki users are advised to make their Mana Parameter as high as possible to make it more effective, good that using Ki helps increase the Magic and Mana Parameters as well so it's not that hard, however, as it is said many Ki user's do have a tendency to lose control as some users are unable to handle so much power flowing into their bodies at times, and while Ki is powerful, it can also create illusions as well, in some advanced cases, some can even create perfect illusions to cause physical damage, however, this does drain Mana like magic, so prolonged use of these techniques can cause a Mind down if the user is not careful as well as cause damage to the body over time, this is namely used to shapeshift and go undercover mostly, the way to use Ki is simple, yet difficult, the steps to use it are as follow

One must be able to use a breathing technique known as Total Concentration Breathing were an advanced and esoteric breathing technique where a user is able to breathe in the Mana from their area and use that to enhance their body by having it flow throughout their body as well as learning to maintain a constant state of Total Concentration Breathing while using Ki, even subconsciously

kneaded their inner Mana to connect their inner magical and physical energies to be able to enhance their body by letting Mana flow throughout their body like a stream and river, relaxing their body to a point of having almost no stiffness or soreness anywhere (also leading to many who practice it for the first time peeing themselves) and being able to feel the Man flow through them

Being able to focus their mind and imagine the Mana flowing through them, a trigger for it, and a way of maintaining it, like a running river throughout their body

As this all sound's easy, it is far harder than it seems for all who attempt to master it, only 4 out of 10 people who try to use and master Ki ends up actually being able to master it, as such, people who can use Ki are seen as must-haves in Familias for the gods since not many can master it