Unlocked at level
40

Custom Engineering

Increase the duration of your Caltrops, Marked for Death, Spike Trap, and Sentry by 100%.

Increase the maximum number and charges of Sentries to 3 and number of Spike Traps to 5.

The self-loading mechanisms built into most hand crossbows and traps are delicate and difficult to maintain. Extensive practice is required to use them properly.

Note: Information on this page is based on a level 70 character.