From Dragon Quest Wiki
Quest #88 - "Buckler's Buckler"
Location Swinedimples Academy - room adjacent to the headmaster.
Availability After defeating the Dreadmaster, when a party member has 100 shield ability.
Requested by Buckler
Fulfilled to Buckler
Reward "Secrets of the Shield" - guaranteed block of Critical Hits when equipped with a shield
Detail Finish off 10 Killing machines with the Blockenspiel ability.
Hint for solution Find them in Gittingham Palace or the surrounding areas.
Repeatable {{{repeat}}}