Heavy
From Guild Wars Wiki
Heavy is a weapon upgrade that lengthens the duration of the Weakness condition that you inflict upon your foes by 33%. This affects conditions inflicted by any skill, not just from attack skills, as long as the weapon is equipped when the skill is used.
[edit] In-game description
[edit] Upgrade components which provide this bonus
[edit] Notes
Despite the in-game description, while a Heavy weapon is equipped, the duration of any Weakness condition inflicted by a skill will be increased, even if the skill is self-targeting (such as Wearying Spear).
