Your monestary considers the fearsome hydra an object of devotion.You master techniques to mimic the amazing power of beasts.At the beginning of your training you learn to strike with the many of the heads of the hydra and master their regenerative power.Later, you can control their powerful breath and watch the world with their many eyes.

steamy breath

AT 6th level,you can create a blast of powerful steam breath.As an action,you can expend 2 ki to cast fog cloud centered on yourself.Upon casting all creatures inside the fog cloud must make  a dex save (dc 8+your wisdom mod+plus your prof bonus) or take 2d6 fire damage as they are scalded by the powerful steam.

hundred head technique

Starting when you choose this tradition at 3rd level, you learn to strike with the many heads of a hydra.When you use you flurry of blows one of the extra attacks deals an extra 1d4 acid damage.In addition,you can choose to make 3 unarmed strikes with your flurry of blows,when you do so all of the attacks are made at disadvantage and deal an extra 1d4 acid damage on hit.

Hydras regeneration.

At 6th level, you gain the ability to heal yourself. As an action, you can regain hit points equal to three times your monk level. You must finish a long rest before you can use this feature again.

sleepless strikes

Beginning at 11th level, you cannot be surprised and can add your prof bonus to your initiative checks.In addition,if all the unarmed strikes you make in a round are against the same target you have advantage on the next attack against that creature before the end of your next turn.Until then the creatures speed decreases by 10ft.

endless heads.

At 17th level,you learn to make use of the endless heads of the hydra.As an action,you can expend 5 ki to cast regeneration on yourself.While under the effects of this spell you have an additional reaction and your steamy breath feature costs only a single ki.