Naruto: Mission: Protect The Waterfall Village! (novel)

Summary
Naruto and the gang return home after a stint protecting Shibuki, the leader of Takigakure. But there's danger back in Konoha. Sasuke and Sakura are quickly captured and the tow-headed ninja-wannabe finds himself in a desperate situation. Turning to Shibuki for help, Naruto discovers the revered leader is actually a coward and false hero. Alone, Naruto must protect his home, his friends and the Takigakure's Hero Water.

Prologue
In the middle of a pristine lake, Hisen stood on a tall geyser, rapidly moving his fingers. The leader of Takigakure had high hopes for the ninjutsu he was about to use was about to release. His attackers had been surprisingly tough, and now they were treading water in a circle around him, poised for his next move.

This should do the job, Hisen thought. He finished his signs, looked up, and shouted at the sky. "Water Style: Lotus Light Rupture!"

The geyser instantly started to rotate, forming drops of water that looked like lotus petals. It was a lovely sight, It was a lovely sight, like something you might see in a Zen garden. The liquid petals got bigger and bigger, then spun off with explosive energy in every direction.

Hisen's attackers snickered as the petals zoomed toward them. They were already soaking wet. How could even more water hurt them? Suddenly a ninja cried out in agony and sank in a spray of blood. Another ninja was hit, then six or seven more. The liquid lotus petals were not as delicate as they looked: Hisen's chakra had transformed them into razor-sharp killing machines.

A few ninja escaped the attack by sliding backward on the lake's surface, but the watery weapons they thought they had dodged soon hit them from behind. Minutes later, every ninja was gone. Only their leader was still alive, a man in a red mask.