Fang Smash

The Fang Smash is a Smash created by Faust and a minor antagonist in Kamen Rider Build, appearing only in a flashback in episode 13.

History
The Fang Smash was presumably created by Faust from a human test subject and sent out to cause havoc. After receiving his Build Driver from Soichi Isurugi, Sento Kiryu went out to confront the Fang Smash. He was initially beaten down by the monster until he used the Driver to transform into Kamen Rider Build to defeat the monster. The outcome of the battle isn't shown, but it can be assumed Build destroyed it and purified its host.