Your body becomes that of Zetsu. You heal faster, you can regenerate, and you can absorb or send others chakra by skin contact. You can even clone yourself, but it takes energy.
Your body is incredibly malleable, able to implant DNA of nearly anyone into yourself to gain extremely weakened powers. You can even shapeshift yourself, copying the energy level and looking (and feeling) exactly like who you're shapeshifted into. Sensors will be confused, unless they can sense emotions.
You also gain the Mayfly technique, able to put yourself into the ground or trees, even if the ground is stone, and travel nearly undetected.
Powerful detection methods are the only way for someone to detect you.