A Hero's Group

A group of heros at the age of 20 were determined to stop villains that were gonna destroy the world. Their names are Seraphina, Crystal, Frostbyte, and Wraith. Translation of their names: Fire, magic, ice, and teleportation. You can be any hero. Seraphina and crystal are girls and the rest are boys. How they became heroes is when they gained power from a secret cave that stored unknown energy and they were granted powers.