Prerequisite: The player need to grow up to level 12 The player need to know all the feats of the Avaerage Haki user The user needs to learn the Observation Haki The user needs to learn and dominate the conqueror haki
This is the advanced form of the power known as Haki, only the bests and strongests can achieve to learn this forms of haki.
This power requires a great will and discipline from them users, so its very strange that someone can learn to use the three types of Haki, only the legends have achieved that.