Nurikabe with Douji+Hime

From "Kamen Rider Hibiki".
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Douji ( 童子 ) and Hime ( 姫 ) of Nurikabe: They were raising a Nurikabe at Shimotsuke, able to merge with the trees, and use their bodies to body slam a person to death before feeding the victim to their child. They were the first to be receive the Armored forms, overpowering Hibiki at the first round. But the duo regressed as a side effect of the armor in the 2nd bout and were both killed by Hibiki's RekkaDan.

Nurikabe ( ヌリカベ ):
The giant type makamou with the feature of a snail for a head and a bag worm body, posing as a tree in Shimotsuke before it crawled toward the city until it was destroyed by Hibiki's Mouka Dotou form. During the start of Orochi, a Nurikabe appeared around the Western House. The Man was unable to seal it, forcing him and the woman to destroy the berserk monster.

(c)Toei