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The Wizard had been watching from afar, and knowing that it was partly his fault, decided that the people had suffered enough

He did not want another monster found and then escaping, so he returned to the country.

He informed the people that some day they might indeed find a monster. He told them that they then should look after him properly and make sure he is correctly housed. This monster must be well trained and content so that if he can be harnessed for work then he will be happy and will not want to escape.

.............Because the people  listened to the wizard he called on the powers of the earth to give them special qualities. 

For being attentive to the wizard he gave them the shield of knowledge to enable them to decide their future actions and to solve the problems the last monster had caused.