When the embryo spends a long time in eternal sleep, the gap in the 'door' gradually widens, and the power of the dream also disappears.
People's power was no longer enough to maintain the existence of Sweetheart, and together with the Soul Egg, they disappeared from this world.
In order to make up for the mistakes he made, the embryo used the power of the law to go back to the past, find keys and locks, and completely seal the 'door'.
However, the embryo learned that the power of the key and the lock was running low. Only the light when purifying the bad guys could be turned into power and filled with power.
——"The embryo is inherently good, but you continue to do evil, polluting the pure power of dreams."
——"You are no longer a magic egg."