Reduce the Cooldown of Smoke Screen by 0.5s for each enemy hit by Poison Bolts.
Level 1
Cloak
Hidden
Increase the duration of Hidden by 5s.
Level 5
Preparation
Armor
When activating Hidden, refill Wrist Crossbow's Ammo. While Hidden is active, reduce the damage you take by 75%, but reduce the maximum duration of Hidden to 3s. The duration of Hidden cannot be increased.