Templar key
The Templar keys were a set of fives keys which together granted access to a vault in the manor on Great Inagua. The keys were entrusted to five Templars stationed in the Caribbean: Julien du Casse, Hilary Flint, Lucia Márquez, Kenneth Abraham, and Jing Lang. After the pirate Edward Kenway delivered a map showing the locations of Caribbean Assassin bureaus to the Templars, the keyholders, excluding Du Casse, were each assigned a bureau leader to execute.
When Edward assassinated Du Casse and procured the first key, he discovered the vault it unlocked contained a desirable set of armor. Upon finding a map showing the locations and missions of the keyholders, he agreed on Mary Read's insistence to warn the targeted Assassins, provided it led him to the other four keys.
Gallery
<gallery captionalign="center" position="center" spacing="small" widths="180"> DuCassekey.jpg|Julien du Casse wearing his Templar key This Old Cove 7.png|Edward using one of the keys in the Great Inagua manor HilaryFlintTemplarkey.jpg|Rhona Dinsmore taking a Templar key from Hilary Flint