Simplify the following text for a Grade 6 native English-speaking person.
Original: At the end , the Golden Fleece ( a powerful healing item ) releases Thalia 's spirit from the pine tree that kept it .
Simplified: At the end they get Grover and the Golden Fleece ( a powerful healing item ) from the cyclopses island . And the Golden Fleece releases Thalia 's spirit from the pine tree that kept it .