What is tusk act 4?

Tusk Act 4 is a stand from the manga and anime series Jojo's Bizarre Adventure. It is the final and most powerful evolution of the stand Tusk, owned by the protagonist of Part 7, Johnny Joestar. Tusk Act 4 is a humanoid stand with a mechanical appearance and is physically powerful. The stand's most prominent ability is the power of the Golden Ratio, which enables Tusk Act 4's bullets to bypass any defense or obstacle and reach their target with great precision. The stand's Golden Spin also allows it to manipulate space and time, and create infinite energy, making it nearly invincible. Tusk Act 4's design was inspired by Leonardo da Vinci's Vitruvian Man, which influenced the stand's geometric, mathematical appearance.