for 'Memories of the Minotaur' be sure to interact with the Minotaur in the castle in the chasm and make sure you can approach him so that way you can call on him when the main bad guy says "BEGONE" and you have to choose someone that pops up and if done correctly you should be able to choose the Minotaur and then you will get it after you go to the end and have to be reborn.