Metallic spear, swift and silent, unites and divides in a single twist. Embedded within the mechanical heart, it secures destiny with unwavering precision.

Suddenly I do not move Because of me you cannot move forward, around or behind. Usually you spot me in traffic once it's too late but today it's at the DMV just watching every other letter or number called but me

Among the four, I represent West. But I am king of the East, Engaged in eternal conflict with the dragon.

I am your border for privacy, or simply to add scenery. I can be made from many materials, and many old dreams have a white version of me.

With pointed fangs I sit and wait; with piercing force I crunch out fate; grabbing victims, proclaiming might; physically joining with a single bite. What am I?