From Guild Wars 2 Wiki
— In-game description [?]
- Applies a distinct Decoy effect that is different from normal stealth. As such, it can be used while revealed and can be active at the same time as regular stealth, but will not stack in duration. Attacking while under the effects of Decoy will still result in being Revealed.
- Only creates a clone when targeting a foe within range. If no foe is targeted, using the skill will still apply the other effects.
- This skill will cancel any activation time when used.