The plan went wrong exactly as planned. The little girl at the source of the dream was far more mature than they had imagined. Her mental age did not seem to have remained frozen in the year she died; it had continued growing with time. So after Batman entered the dream twice, she noticed that something was wrong and directly kicked everyone in the operating room out of the dream.
But unsurprisingly, the little girl could do nothing to the two of them. Other than preventing them from entering the dream again, she truly had no way to deal with such shameless tactics.
Batman and Schiller clearly had no intention of giving up either. Just as they were studying a new solution, Natasha arrived.
Unlike Wanda, an ordinary potion-brewing witch who seemed harmless to humans and animals alike, Natasha was a Combat Witch. She was proficient in all kinds of offensive magic and curses. She had once successfully escaped from the hands of a great mage and left him with permanent injuries.
Even so, she had inherited several important potion recipes, including the Dream Potion.
After speaking with Batman and Schiller, they decided to brew this potion and forcibly enter the dream, using their own memories to overwrite the little girl's memories.
They knew they could buy the ingredients for the Dream Potion from the Bear Attendant, so Schiller and Batman tried to earn money by treating patients.
Contrary to Greed's expectations, they had not taken many patients at all. They had only accepted one, and even that ended in failure.
After comparing the complexity of treatment, the likelihood of failure, and the potential income, Batman knew this route would never work. Treating patients for money was a thankless task with abysmal efficiency.
After that one patient, they never accepted