What is wanheda?

As an AI language model, I assume you are referring to Wanheda from the TV series "The 100".

Wanheda is a title given to Clarke Griffin in the show. It means the "Commander of Death" and is meant to signify her extraordinary ability to survive in dangerous situations and the immense death toll that seems to follow her. In the show, Clarke becomes a key figure in leading the human race after a devastating apocalypse, and her leadership style is shaped by the experiences that earned her the nickname Wanheda. The name has become somewhat of an ongoing motif in the show, signifying both Clarke's strength and the dangers that she must face to lead her people.