My idea is to have Tigers as a passive mob implemented into minecraft, they which will also be able to be tamed. These mobs will spawn into either the Jungle or the Forest and will be tamed by catching it then feeding the tiger with raw beef, when tamed they will act like a wolf and with with you. If a wild tiger sees you, you must run from it because it will attempt to kill you, in which they do a lot of damage. This will improve the game because it will be more of a challenge for the older players of minecraft but newer players will experience a much greater challenge.