Aleph spoke further.
"Regarding gratitude for choosing you as my true heir, Eren, I must clarify that it wasn't my decision. It was you who proved yourself worthy and selected yourself as my true heir.
I cannot predict whether this will be a blessing or a curse for you, reaching this point. However, I am genuinely pleased that you are precisely the kind of individual I hoped would inherit my throne.
You see, Eren, these so-called gods, being immortal, cannot sire children of their own. That's the reason they create their legacies and leave them behind in mortal worlds.
The Elder Seed Artifacts I created were the legacies I had left behind in mortal worlds. But who would have thought the true inheritor of my throne would emerge from something I didn't plan at all? Even for a god, the stings of fate can be unpredictable sometimes.
But… um… never mind. In a way, you are the closest thing to a son I have," Aleph disclosed with a warm smile.