Guild Wars 2

Elaboration of a thread posted on the Thief forums a few months ago that never made its way to the Game Bugs forum:

The regeneration boon from this trait does not stack with itself. Moreover, it does not stack with any regeneration boons from any source once applied. For example, a thief goes into stealth, triggering this regeneration. The thief then receives regeneration from another source, increasing the duration of his regeneration as all other sources of regeneration will do. However, the thief is unable to stack further duration with this trait by entering stealth again. Only after the regeneration boon wears off does the trait effect become available.

To further clarify, there is not a cool down on this trait. The regeneration can be reapplied as soon as 5 seconds (that is, if no other regeneration was present and none is received) or, conceivably, never again if the player continually receives regeneration from another source.

This bug persists even if a second thief attempts to apply the regeneration with this trait.

The uniqueness of this restriction is the reason for reporting this as a bug; however, it is possible that this is simply a poorly designed trait that is working as intended.

Concerns regarding the potential power of this trait if the regeneration was consistent with all other sources of regeneration in the game were brought up in the aforementioned thread. While it is beyond the scope of this bug report, it is worth mentioning that a cool down (added to the trait and, ideally, noted on the trait description) would allow for balancing of the trait as needed. For example, with no cool down, Shadow Refuge could apply up to 25 seconds of regeneration. Adding a 2 second cool down to the trait would reduce the maximum duration of regeneration applied from Shadow Refuge to 10 seconds.