This is a Freeport city task from Corsair G'Kex of the Seafury Buccaneers in South Freeport.
1. Kill 21 Frosthorn minotaurs in Everfrost. (142.67,20.54,-596.28)
The Freeport City Tasks guide needs to be updated. For levels 40-44, the quests now given from Corsair G'Kex of the Seafury Buccaneers are:
Bite Out of Crime (41)
Pups on the Rise (42)
Troubles Melt (43)
To Sulphurous and Tormenting Flames (45)
Wormling Defenses (45)