Um... Why Did That Backfire?

Sékàrúfári:
As is common with abilities, they come at a price. The price for the Flàré is known collectively as the Bílèfári. There are three different levels of the Bílèfári which are connected, or in some way, at lot worse than the previous level.

The first of the Bílèfári is called the Sékàrúfári. It is the drawback that happens when either the Sétài (First Flare), the Kàtài (Second Flare), or the Rútài (Third Flare) is overused. The point of this Bílèfári is to remove the Flàré's ability to use their Òtài (natural manipulation). Since the Flares are built upon the Òtài, pulling it out form underneath prevents the Flàré in question from using any of their Flares. Below you'll find the complete list of all the Bílèfári:

Frònéi:
The user feels that their fingertips are beginning to burn with unbearable pain.

Véri:
The user feels that they are beginning to suffocate.

Ynèré:
The user starts to feel their palms crackle with an intense pain.

Clèsi:
The body of the user, which is usually immune to the cold, begins to feel a bone-chilling coldness.

Lòég:
Almost for no reason, they user starts to feel excessively tired.

Nàrrice:
The user's hearing rapidly diminishes until they are completely (though not permanently) deaf.

Éru:
Harder to detail as a concept, this Flàré have innate sense of what is happening 'upstairs' and as such their Sékàrúfári is a loss of this feeling.

Úshk:
Harder to detail as a concept, this Flàré have innate sense of what is happening 'down below' and as such their Sékàrúfári is a loss of this feeling.

Dàé:
The user starts to realise that they have a headache so strong that they are unable to even think straight.

Lsòla:
The user starts to become aware that their body is in a whole heap of unbearable pain.

Gé:
There is no apparent Sékàrúfári for this Flàré.

Téiq:
There is no apparent Sékàrúfári for this Flàré.

Luèfári:
Ok, so that's the first bit - but guess what! There's more (come on, with me, that's always gonna happen!!). Draven was the first to activate this second form of the Bílèfári, now known as the Luèfári. It is the drawback that happens when the Luètài (Fourth Flare) is used. It may not happen every time it is used, but it can definitely happen when Flàré in question tries to max out the Luètài. This Bílèfári doesn't prevent the usage of the Òtài, but it has a personal bodily effect. Since the Flares use energy from the body of the Flàré, it is understandable how deadly this is. After knowing only three (for Nàrrice, Dàé and Lsòla), below is a complete list of the Luèfári:

Frònéi:
Instead of just the fingers, this time the skin on both arms begins to peel and instantly vaporize from the heat created by the Flame Tunnel that was just used.

Véri:
Now, instead of the suffocating feeling, it is replaced with a feeling that the user is drowning while standing in broad daylight, the water from the recently used Water Spiral being that which is drowning them.

Ynèré:
The whole body begins to shake uncontrollably, the crackling feeling now extends to the entire body, as it feels the electricity in the Spark Shot just used is also zapping them.

Clèsi:
That last Spike Throw creates such an intense cold field around the user that their body begins to freeze on the spot. Their feet freeze to the ground and the cold feeling has become a numb feeling.

Lòég:
The user's body becomes so slow that taking one step feels like it's going to take the better half of the next century to complete. The feeling is coupled with an odd sense of losing touch with the earth from that Boulder Smash they just used.

Nàrrice:
The user's skin peels off at a rapid rate and adds to the Wind Slice that was just used. This, undoubtedly, gives the user extreme pain.

Éru:
Instead of losing a simple form of communication, the user suddenly feels like they have lost all their spirituality. This is a result of the sheer pure force they just loosed from themselves in that Heaven's Might.

Úshk:
After that last Hell's Fury, it feels like the spiritual connection they have with the underworld has been forcibly ripped from their body.

Dàé:
The whole body becomes completely numb and the person can't feel a thing. After using that Pentad Form, their power diminishes and diminishes. However, even with a numb body, the pain in their head is extremely difficult to bare.

Lsòla:
The whole mind becomes completely numb and the person can't feel a thing. After using that Quintet Spin, their power diminishes and diminishes. However, even with a numb mind, the pain in their limbs is extremely difficult to bare.

Gé:
Again, there is no apparent Luèfári for this Flàré.

Téiq:
Again, there is no apparent Luèfári for this Flàré.

Dàkúrùfári:
Ok, you got me! There's one more. I'm always like that, but hey. The Dàkúrùfári is the final and most brutal drawback that you can receive for the overuse of your powers, and more specifically always occurs with the overuse of the Dàkúrùtài (Fifth Flare). It is instant and painful - a hell of a lot worse than the Luèfári. After knowing only two (for Dàé and Lsòla), below is a complete list of the Dàkúrùfári:

Frònéi:
The user suddenly feels so parched that their insides are burning up as they ache for some sort of moisture. They begin to keel over, attempting to acquire water.

Véri:
The user suddenly feels so cold, as in the feeling you get when you are covered with water, cannot remove it and are without any heat sources at all. They begin to fall asleep to stop the cold.

Ynèré:
The body of the user is forced into uncontrollable writhing. Their muscles are s wound up, they can't move of their own accord, not to mention the brain-numbing electrical surges throughout the body.

Clèsi:
The user is now so iced over, his nerves have completely detached themselves from the brain. They feel as if they are on their way to that bright light - being that detached from your body can do that to you.

Lòég:
The users body has turned to stone by this time. Well, not quite stone, but they won't be moving at all any time in the next millennium.

Nàrrice:
The user now feels that they are completely as light as a feather. This creates such a feint feeling in their head that they are effectively comatose.

Éru:
The user has completely lost all form of their soul for a while and are effectively an 'empty shell'.

Úshk:
The user has completely lost all form of their soul for a while and are effectively an 'empty shell'.

Dàé:
This is complete and utter unconsciousness. The pain felt throughout the whole mind is so terrible that it can't cope, and shuts down. The person may not wake for a week or more, and is in a very fragile condition as a result.

Lsòla:
This is complete and utter paralysis. The pain felt throughout the whole body is so terrible that it can't cope, and shuts down. The person may not be able to move for a week or more, and is in a very fragile condition as a result.

Gé:
Indeed, this is where we first see any drawbacks at all. The use of the fifth Flare takes years of life off the users life-span.

Téiq:
Indeed, this is where we first see any drawbacks at all. The use of the fifth Flare takes years of life off the users life-span.