Great Ming Military

Drawing of Wan Ren Di in action, from 'Tian Gong Kai Wu (《天工開物》)'.

Wan Ren Di (萬人敵, lit. 'Rival ten thousand men') is a type of improvised incendiary bomb developed during the last years of the Ming Dynasty. It is designed to defend relatively small and remote cities and fortresses, where ponderous cannons won't be of much use.

Wan Ren Di is a relatively simple weapon that can be cheaply and easily manufactured. It consists of two components: a hollowed clay ball filled with various types of propellants and gunpowder (usually incendiary or poison smoke), as well as a boxy wooden frame. Alternatively, a wooden barrel with its inside fireproofed with clay can be used instead.

Like Fei Huo Xiang Mo Chui (飛火降魔槌), the bomb does not detonate after being thrown. Instead, the clay ball will start spinning inside the wooden frame (which is used to protect the clay ball from breaking apart during impact) and projecting fire all around it, effectively deny the area to the enemy for an extended period of time.