The power of creation itself - making something from nothing, violating the fundamental rules of the Small Science. Merzost is considered an abomination by the Grisha, as it corrupts both the user and the world around them. The Darkling used merzost to create the Shadow Fold and the nichevo'ya (shadow soldiers), and each act of merzost left a lasting scar on reality. The cost of using merzost is always terrible, producing unintended and monstrous consequences.