Obsidian Vajra

The meaning of the Vajrayana is a symbol of the invincible and invincible spirit. Originally, Vajrayana was a name for photoelectricity, but with people's oral communication, it finally evolved into a weapon. Vajrayana itself is extremely hard and can break very hard things, which is very consistent with the name "Vajrayana", so it also has the meaning that everything can be destroyed.