Bankai in Bleach
In general, Bankai is the last release and manifestation of the true weapon form of a Zanpakutou.
Bankai may enhance the users attributes or put in a complete new form of manifestation...
Bankai on Legend Of Bleach
The Bankai itself does pump up the user and helps him fight, hence the different aspects are enforced by different types. For instance, "power" aspect increases your attack by 80%, which relies on strength.
You need to have at least 25 final tests taken to get the preparation at Urahara for your Zanpakutou. Once you are there, you have to "buy" your way up to level 8. There is a small chance that you succeed - so basically have enough gold with you there. You will not die in this kind of training.
Level 9 will be achieved by paying gems to Tessai - who will then ready your final challenge. You will only have to pay once - regardless of your success or not. In the last test - you may (and will possibly) die.
Now, to get to the final level, you have to fight your Bankai in its true from.
After that, you should rush to your master (Train Inner Self). He/she will then give you time to meditate and name your new bankai release.
Power: Golden Samurai
Kidou: Illusion Weaver
Fire: Fire Cat
Water: Water Elemental
Wind: Hurricane Spirit
Ice: Mystic Ice Dragon
Lightning: Thunder God Raijin
Types and effects
Power: 40% damage, 20% of enemy damage reflected
Kidou: 60% defense
Fire: 60% attack
Water: 30% attack, defense 30%
Wind: 60% damage
Ice: 30% defense, 30% damage
Lightning: throws 30% of enemy dmg back at him, 30% more own damage
this is in development
Each form gives currently one new specialty use.
This means, once you release, you can use 1 new specialty that is otherwise locked.
They are cheap, and will currently deliver direct damage hits that STRONGLY (!!) depend on your attributes.
Fire requires Constitution to wield.
Water requires Wisdom to control.
Wind requires Constitution to endure.
Lightning requires Intelligence to channel.
Power requires Strength to enforce.
Kidō requires Intelligence to manifest.
Ice requires Dexterity to conjure.