Baku

The is the summoned creature of Danzō Shimura. It is a gigantic elephantine chimera with tiger-like limbs and bandages wrapped all around its head. Danzō summoned it during his battle against Sasuke Uchiha, but it was forced to disappear when Sasuke launched a fireball into its mouth.

Abilities
The Baku is said in legend to be able to devour dreams and nightmares a fact that Madara Uchiha also echoed. When it opens its mouth and inhales, it can create a powerful suction that sucks in everything within a large radius, while at the same time exhaling through it's trunk. Danzō attempted to use it to draw in Sasuke's Susanoo and also took advantage of the suction to increase the power of his Wind Release: Vacuum Serial Waves which together created an opening in Sasuke's Susanoo creating an opportunity for Danzō to attack. However, the suction also has a disadvantage as seen when Sasuke launched a fireball into its mouth, the suction also increased its size and power of Sasuke's technique.

Trivia

 * A is a mythological Japanese creature said to eat dreams and nightmares. As a chimera with an elephant's trunk, a rhinoceros' eyes, an ox's tail, and a tiger's paws, they resembled somewhat the real-life tapir. After the two creatures were connected, the baku was more and more often depicted as a tapir. Modern images depicting Baku as actual chimera are rare.