What was pennywises weapon in it?

In Stephen King's "It," Pennywise the Clown primarily uses fear as his weapon, feeding off the terror of his victims. He can shape-shift into their worst fears, manipulating their minds and emotions. Additionally, he employs physical violence, often using sharp teeth and claws to attack. His true power lies in his ability to instill fear, making it difficult for his victims to confront or escape him.