Simplify the following text for a Grade 11 native English-speaking person.
Original: After a fierce battle , Ozai slams Aang into a rock , hitting the scar on his back from Azula in the previous season , inadvertently releasing his locked seventh chakra and making him enter the Avatar State .
Simplified: After a fierce battle , Ozai slams Aang into a rock inadvertently releasing his locked seventh chakra and enters the Avatar State .