Guild Wars 2

Hello,
In order to complete the achievement, where can we get tricolor/single color keys ?
Is buying it from Dee the only way ?

Thanks

They also drop occasionally. I’ve gotten a couple pieces from doing the Spider/Wurm/Alchemist events.

Look at the description of the keys. They tell you which area of Kessex hills each can drop from. I can’t remember at the moment.