🔄Body swaps and learning from each other may have led to significant power-ups during the time skip.
🕒A hyperbolic time chamber-like concept could explain the exponential growth rate of the characters.
💪Complex binding vows might have been used to temporarily boost the characters' powers.
🤔The prison realm and the sumo guy's simple domain could also be factors in the power-ups.
❓The exact details of the power-ups and the meaning of Aotu's comment remain unknown, leaving room for speculation.