Answers

2016-07-29T17:56:09+08:00
He longing for his wife Eurydice so he decided to follow her in the underworld and he play his lyre there with a sad song to let him Eurydice free and he did it because Cerbarus , Tantalus , Sisyphus , Ixion included King Hades and Queen Persophone felt his sadness

also

When he play with his lyre all the living things on earth summon just to hear his song
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