From Dragon Quest Wiki
Quest #100 - "Busted"
Location Dourbridge
Availability After completed quest #99, with a level 40 thief in your party
Requested by Buster
Fulfilled to Buster
Item Required Item icon.png Lunar diamond
Reward Item icon.png 'Thief's Theory' and 10,000 G
Detail Buster, the thief you met in the pub in Dourbridge, wants you to help him get revenge. He need you to steal back a lunar diamond from a sorcerer in the basement level of Gerzuun.
Hint for solution Go to Gerzuun and head to basement, use Half Inch when you meet a sorcerer.
Repeatable {{{repeat}}}