Battle for Sky Kingdom by Remi Blackwood

The fourth book in this major series: FUTURE HERO - featuring high-octane adventure, perfect for fans of Black Panther! Destiny is HERE ... Jarell is the hero Ulfrika, the land of his ancestors, needs and he must return if he is to stop the sorcerer Ikala from gaining power. Jarell and his friends journey to Sky City to find what they need to defeat their enemy.