The curse seal, also known as Juin, has two stages:
First Stage - the seal spread through your body.
Second stage - you take a form of an animal or demon.
The curse seal can only be obtain by receiving the Juin Jutsu (Curse Seal Technique)
To reach the second stage the ninja can over time adapt to the seal and control over it or take a Seishingan and be sealed into a coma state temporarily.
The power you gain doesn't mean a big increase in chakra. In fact using the seal will quickly drain you energy. What you gain is a huge physical boost in speed, and strength. Also each seal is different and has it own unique ability.
Ex.
Sasuke gained wings.
Kidomaru gained the ability to create spider silk. And a 3rd eye.
Ninjutsu require to perform forced second stage transformation:
Shikokumujin (Four Seals of the Dark Mist)
A barrier Ninjutsu technique. This barrier creates a permanent lid to seal an open barrel, in which is placed a ninja with the Juin (curse seal) that Orochimaru bestows upon his minions. Inside the barrel, the ninja is left in a comatose state, after taking the Seishingan (the pills that induce the push to the second level of the Juin) as the second level of the curse seal begins to take effect.
The technique requires four ninjas fluent with barrier Ninjutsu to stand in a circle around the barrel, focusing their chakra until a dark, swirling mist appears. The mist circles the barrel from above and then closes down upon it, solidifying into the lid.
Houin Fuukoku (Dark Seal)
A Fuuinjutsu (sealing technique), which is the final step to the Shikokumujin (Four Seals of the Dark Mist). One of the ninjas creates seals on five pieces of paper using their own blood, and then throws them at the barrel needed for the barrier technique. Clasping their hands together, they speak the seal's name and the five papers become attached to the barrel's lid, keeping it secure. This seal may be permanent, only lasting until the first barrier is either broken or the transformation of the ninja inside is complete.
First Stage - the seal spread through your body.
Second stage - you take a form of an animal or demon.
The curse seal can only be obtain by receiving the Juin Jutsu (Curse Seal Technique)
To reach the second stage the ninja can over time adapt to the seal and control over it or take a Seishingan and be sealed into a coma state temporarily.
The power you gain doesn't mean a big increase in chakra. In fact using the seal will quickly drain you energy. What you gain is a huge physical boost in speed, and strength. Also each seal is different and has it own unique ability.
Ex.
Sasuke gained wings.
Kidomaru gained the ability to create spider silk. And a 3rd eye.
Ninjutsu require to perform forced second stage transformation:
Shikokumujin (Four Seals of the Dark Mist)
A barrier Ninjutsu technique. This barrier creates a permanent lid to seal an open barrel, in which is placed a ninja with the Juin (curse seal) that Orochimaru bestows upon his minions. Inside the barrel, the ninja is left in a comatose state, after taking the Seishingan (the pills that induce the push to the second level of the Juin) as the second level of the curse seal begins to take effect.
The technique requires four ninjas fluent with barrier Ninjutsu to stand in a circle around the barrel, focusing their chakra until a dark, swirling mist appears. The mist circles the barrel from above and then closes down upon it, solidifying into the lid.
Houin Fuukoku (Dark Seal)
A Fuuinjutsu (sealing technique), which is the final step to the Shikokumujin (Four Seals of the Dark Mist). One of the ninjas creates seals on five pieces of paper using their own blood, and then throws them at the barrel needed for the barrier technique. Clasping their hands together, they speak the seal's name and the five papers become attached to the barrel's lid, keeping it secure. This seal may be permanent, only lasting until the first barrier is either broken or the transformation of the ninja inside is complete.
