The Training Tower is your primary source for leveling up heroes and earning Hero Feathers. It consists of ten strata, each with increasing difficulty. You can choose to battle with a specific blessing (e.g., Fire, Water) to gain bonus experience for units with matching blessings. The 'Daily Grand Hero Battle' and 'Special Training' maps within the Training Tower offer even greater rewards and experience. Always aim to complete the highest stratum you can comfortably clear to maximize your gains.
