I Can Save the World with Just One Word

Ever since the True God created the First Lord, created humans, dwarves, elves, mermaids, dragon-taming tribes, angels and demons, there have been constant battles between races. When the bells of the old city reappeared and the wars between the seven races continued to expand and increase, the wizards received the oracle. When the destined man and his guardians arrived at Tastill Falls and answered a question from the god, then the conflicts between the seven races would end and there would be no more wars in the world. And this task fell to Kamel, a "weirdo" who possesses all racial characteristics at the same time. When his adoptive parents were killed by the war, and when the wizard brought him the opportunity to save the world, he finally chose to embark on this path. In the future, how will he and his guardians save the world?