The contract methods for spirit beasts were mainly two types: the equal contract and the master-slave contract. But these two contracts applied only to mature spirit beasts, and a beast trainer had to tame them before forming a contract. For spirit beast eggs, the process was not as troublesome. Just dripping a drop of blood on an egg was all it took to recognize a master. Furthermore, contracts established this way led to better tacit understanding between the spirit beast and the owner than ones formed with mature spirit beasts. Therefore, some top families would give their geniuses the eggs of high-level spirit beast for them to nurture from birth. But raising spirit beasts from infancy was very time-consuming and resource-intensive, whereas mature spirit beasts could be utilized directly. So many preferred to spend a lot of money to employ a beast trainer to tame a mature spirit beast rather than waiting for a high-level spirit beast cub to mature because it took too long.