Simplify the following text for a Grade 5 native English-speaking person.
Original: In the sky above the field Mufasa 's ghost appears and tells Simba that he must go home because Simba is the right king .
Simplified: The wise Rafiki tracks Simba down and summons Mufasa 's ghost for him . Mufasa tells Simba to remember who he is and that he must return home to take his place as king .