Simplify the following text for a Grade 7 native English-speaking person.
Original: A battle ensues , after which Drek is killed . Ratchet uses the Deplanetizer to destroy Drek 's planet , sending meteorites falling towards Veldin .
Simplified: But Ratchet and Clank kill Drek after a long fight , and use the Deplanetizer to destroy Drek 's new planet .