Tsunade's originally stern, cold expression fell apart the moment she heard Yamanaka Kei's words.
Because of the technique's unique nature, the difficulty of learning the Water Transformation Technique was no less than developing a Kekkei Genkai!
Just how difficult was it to develop a Kekkei Genkai?
Each of the Five Great Ninja Villages possessed some legacies left behind by their predecessors that could be used to develop Kekkei Genkai.
The Sand Village's Magnet Release, the Cloud Village's Storm Release, the Hidden Stone Village's Lava Release, the Mist Village's Boil Release...
But how many people in the entire ninja world could actually learn them?
Did Danzo have that kind of talent?
If he had talent, would he be lying here?
In the end, Tsunade could not suppress the smile at the corners of her lips. She raised a hand and patted Yamanaka Kei on the shoulder.
"Not a bad idea. Don't have it again."
"Kei, secret techniques closely tied to Kekkei Genkai are extremely difficult for those without a Kekkei Genkai to cultivate. Elder Danzo is no longer young. He doesn't have that much time or energy left to study such things."
Sarutobi Hiruzen tactfully gave Shimura Danzo a way out.
Ninjas appeared glamorous, but in truth, it was far from an easy profession.
Constant Chakra refinement and frequent injuries drained the body's potential and left behind all sorts of lingering damage.
For most ninjas, once they passed forty, their physical condition would rapidly decline.
Their abilities and overall condition would also begin to deteriorate.
At Danzo's current age—
It was better not to make things difficult for him with a technique of this level.
Shimura Danzo's already dark expression grew several shades darker after hearing Sarutobi Hiruzen's words.
What did he mean, he was no longer young?
What did he