You can do the same by using a tf artifact from inventory
Fully completing the lamia transformation softlocks the game if the horns were the last part you got, the unlock animal path never disappears from the succubus when you check next unlock and moth tf parts dont have text boxes explaining what skill was given from it causing the character model to appear on screen for a split second. The money given from the investment perk seems to be growing exponentially across all runs whenever a shop is entered.