Meirogan

The Meirogan (迷路眼 Labyrinth Eye) is a jutsu Dojutsu that allows the user to transfigure living creatures from one form to another. This jutsu is considered illegal in most countries due to the fact that it- can change even the biggest man into a little gecko. Of coarse these changes aren't permanent, tending to wear off within a few hours, also this is extremely taxing on chakra reserves, as the most skilled master can only produce four transfigurements in a day.

Background
This powerful dojutsu was created by an Iwagakure missing-nin many years ago. His intentions were to take over the rock village with his new technique. However he had overestimated its limitations and was defeated. Though his body was destroyed by the Iwa ANBU he had written the formula for this dojutsu on a scroll, witch was later found by treasure hunters who copied the information and sold it to hundreds of buyers before they were caught. To this day there are still several of these copies left to find.

Abilities
The Meirogan grants the user the ability to transfigure any creature into another. This rule is absolute, meaning that it will without fail transfigure the intended target, no matter the circumstance. However it is not permanent tending to wear off within a few hours. Also the amount of times it can be used in a day is very limited and the user will have to recover afterwards.