My Pet Lizard Is a Dragon King

The Black Dragon King, back from slaying a god, was backstabbed by his brother! His soul escaped into a dragon egg, summoned as a little lizard. He coughed up a dud, and the crowd laughed: 'This lizard is burping!' The female lead who contracted him made him swallow her necklace! He'll burn it all with dragon flame and defeat bosses with one slap! When his enemy came, he transformed into his half-dragon form, stunning everyone: 'Isn't this the little lizard?'