Ultimate Summoning Beast

Overview
The Ultimate Summoning Beast (究極の口寄せ獣, Kyūkyoku no Kuchiyosejū) was a mixture of different summoning animals that inhabited the animal summoning facility. It was created to be a perfect counter against other shinobi. The researchers of the facility created the creature to be the ultimate summoning. When Honoka tried to seal it, the creature started devouring the researchers and killed Honoka. The creature afterwards started absorbing the other summoning animals on the island and went into a chrysalis state.

Appearance
In its initial form, it resembled a regular pupa with a large body mass and tentacles and small arms. After emerging from its chrysalis, it grew feet as its body gained a more humanoid shape. It also had a mouth on its stomach through which it fed and had tentacles in the area where a mouth would usually be. It was also shown to be able to partially morph its own body into that of the animals it absorbed such as growing wings to fly.

Abilities
Having been created as a counter towards shinobi, the Ultimate Summoning Beast displays a variety of abilities. It can consume other summons in order to gain their abilities, and it's capable of using genjutsu, which it channels towards its eyes, and ninjutsu, as demonstrated with a Lightning Release attack. The creature could also flap sharp wind that was able to cut Kanaya's cheek. As the "perfect counter against shinobi" it had the ability to absorb chakra, as witnessed when Genesis tried to restrain him using her Wood Release.