I remember reading this novel in high school (around 2010-2014). Chosen kids are transported through time into a post-apocalypse world where humans cannot have babies anymore. Each kid represents a god or a goddess from the Egyptian, Nordic, Roman/Greek, Aztec/Mayan, Hindu mythologies and will compete against each other to rule over human kind.
Deities represented: - Athena & Aphrodite (the girl was able to charm speak; however, she was scared of having an ability to control other's will with it). - Shiva (she was scared of having powers to easily destroy) was chosen to represent Hinduism. - Thor (he only spoke his language;therefore, could not communicate with the rest & was the only adult participant) for Nordic faith. - Horus (a clever and arrogant boy who was able to fly/float) for Egyptian. - I don't remember the name for the Aztec/Mayan god , but I remember that the other gods/goddesses were not expecting him to be in the completion.
Every god chosen to represent their realm will be forever lost if the reincarnation kid loses in the game.
I remember their was an oracle, because she was the only one born in this time.
I cannot remember the title nor the author. I remember it's a blue book with a blue bird on the cover.