Guide to Cultivating Immortals in Another World

This is a different world of swords and magic, where adventures, journeys, miracles, and conspiracies are staged over and over again on this continent. Adventurers devote themselves to adventurous undertakings and achieve the reputation of being the bravest; magicians devote themselves to studying magic and become increasingly sophisticated in the true ways of the world; aristocrats and royal powers are obsessed with politics, studying rules and striving for a crown; civilians only seek peace and a stable and happy life. Wait, what do you mean when you say someone is cultivating immortality?