In One Piece vol. 31, there are 13 chapters, from chapter 287 to
299.
Chap 1: The God-Slayer
Chap 2: Meddling
Chap 3: Looking at the Moon
Chap 4: The Light of Cyandora (or, in other version, The Light
of Shandra)
Chap 5: We'll Be Here!
Chap 6: The Lying Cloud Hides the Moon
Chap 7: Trance
Chap 8: The Advent of Thunder
Chap 9: The Beanstalk
Chap 10: The Last Stand
Chap 11: Praise to the Land
Chap 12: The Song of the Island
Chap 13: Fantasia