Bankai (Hyōrinmaru)

Untrained Bankai: Fully controlling and becoming the true master of Hyōrinmaru, has allowed you to use Bankai, the final release of the zanpakutō. In this form, you gain wings and armor and a tail made of ice in this form you gain a fly speed of 60ft. Gain a +2 bonus to your AC, and gain an attack with your tail. During this form, your Shikai cannot be used. However, you can use a fifteen-foot cone breath attack similar, to a white or silver dragon. Dealing 2d6 cold damage, 3d6 at 6th level, 4d6 at 11th and 5d6 at 16th. In this form, you also have three ice flowers around you each with four petals. When you get hit at least one petal will break, no matter the damage, and another will break at every 10 damage at 20 or more. (I.E. Any damage between 1-19, will break only one. 20-29 will break 2, and so on.) When all twelve petals are broken you transform out of Bankai and will take two levels of exhaustion, additionally, if the user drops to zero hit points or is fully killed they will be knocked out of Bankai and take the exhaustion even if revived. Although the user has an immunity to fire and ice in this form it still will take away petals every time damage is negated for fire, losing 2 petals for any 1st level fire spell, 3 for 2nd, 4 for 3ed, and so forth. The fire negation works in a 5-foot radius around the user. The user at any point can enter out of Bankai as an action, exiting out of one's own volition will not cause the exhaustion effects. 

Trained Bankai: You have fully mastered Bankai, and are no longer limited by the flowers on your back. However, being knocked into the dying or dead state will still force you out of Bankai and give you exhaustion. However, now you have a +3 to AC a fly speed of 70ft, and full immunity to fire without worry of the flowers. Additionally, you are able to use the tethered version of your shikai in this form.