Great malboros are the oldest and most dangerous of their kind. Age has toughened their skin, and a diet of monstrosities has made their bad breath positively putrid. Living Fossils. Malboros can live for thousands of years. Few survive that long, but those that do continue growing until they are several times larger than their ordinary kin. After its first millennium, the malboro's body begins to petrify, and its hide takes on a grey, rocky texture.