Becoming a Slime in Naruto

By chance, the Otsutsuki clan came into possession of a World Tree seed.

Though they couldn't uncover its secrets, they used the roots surrounding the seed to cultivate the Divine Tree, also known as the Ten-Tails.

The Otsutsuki clan traveled from world to world, planting Divine Trees.

The Divine Trees devoured the energy of each world and bore Divine Tree Fruits.

The power of these fruits made the Otsutsuki clan extraordinarily strong, granting them an almost eternal lifespan.

Then, one day, the World Tree seed fell into the world of Naruto...