Invincible Holy Warlock from Another World

Traveling to the world of swords and magic, he happened to drink dragon's blood. With the unique properties of dragon's blood, his strength increased every time he used it to save people. ~~~~ The occupational classifications in this book include mages who are proficient in the five systems of wind, fire, water, thunder and earth, warlocks who are proficient in the two systems of sacred and dark, and warriors who are proficient in various martial arts. The levels are from low to high, taking warlocks as an example, apprentice warlock, warlock, warlock, great warlock, king of wars, god of wars, great warlock...