By consuming the essence of the Shinobi, you gain several boons:
*You are imbued with the powers of the shinobi from Naruto.
*Gain the opportunity to rebuild your body the way you want. You will have stats that are peak human, no matter what build you choose.
*Given the skills and knowledge required for an academy student to graduate to Genin.
*You will find yourself being a prodigy at any shinobi-related skill.
*You may choose one or more bloodlines (and/or even create your own) to receive, as well as the knowledge and skill to use them. Any drawbacks from techniques (such as blindness or permanent loss) are instead just long lasting for you. If a technique requires you to sacrifice an eye, that eye will regain functionality about a month later.