It depends on you.
- Do you want the ending where you want to wake up from the nightmare?
! Don't fight the penultimate boss, and accept his offer. 2. Undeniably the worst ending. ! Don't accept the penultimate boss's offer when you don't have three Umbilical Cords. 3. Do you want to see the nightmare to the very end? ! Don't accept the penultimate boss's offer when you have three Umbilical Cords.
- Do you want the ending where you want to wake up from the nightmare? Don't fight the penultimate boss, and accept his offer.
- Do you want the undeniably worst ending? Don't accept the penultimate boss's offer when you don't have three Umbilical Cords.
- Do you want to see the nightmare to the very end? Don't accept the penultimate boss's offer when you have three Umbilical Cords.
Personally I think the first ending is the best.