Hunter's Dagger

Hunter's Dagger is an uncommon +1 Dagger that applies Rupture to the target on a melee hit.^{[See: Bugs]}

Prey often thinks it has escaped the worst of the predator's bloodthirst and fury - but there are always further torments to be meted out.

Properties

Damage: 1d4 + 1 (2~5) + Strength or Dexterity modifier ⁠Piercing
Details:  Daggers;  Rarity: Uncommon; Enchantment: + 1;  One-Handed;  Finesse;  Light;  Thrown;  Dippable;  Melee: 1.5 m (5 ft);  Weight: 0.45 kg (0.9 lb);  Price: 65 gp; UID
MAG_TheHunters_Dagger

UUID
e101101e-e4ba-48b6-9f82-267ca1cd84dc

Stats
MAG_TheHunters_Dagger

The holder of this item gains:

If you have proficiency, equip in main hand to gain:

 Flourish (): Feint an attack to possibly throw your opponent  Off Balance. ( Recharge: Short rest.)

 Piercing Strike (): Stab an enemy and possibly inflict Gaping Wounds Gaping Wounds. ( Recharge: Short rest.)

 Lacerate (): Slash at your target's vital points to make it  Bleed. ( Recharge: Short rest.)

 Ruptured

Duration: 3 turns

Take 1d4⁠⁠Piercing for each 1 m / 3 ft movement. Each time the damage is triggered, reduce the condition duration by 1.

Shattered Sanctum X: 272 Y: -31: Sold by  Roah Moonglow, to the left beyond the sanctum entrance

Regarding Rupturing:

The Ruptured condition is applied only to weapons and weapon actions with this passive feature.
The Ruptured condition is not applied when the weapon is  Thrown.
The duration of the Ruptured condition does not stack with multiple hits. Each subsequent hit resets the duration to 3 turns.

Hunter's Dagger has a chance to reappear in Roah's merchant stock whenever it resets, like non-unique equipment, and can be acquired multiple times.

Regarding Rupturing:

The in-game description says the target has a DC 13  Constitution saving throw to avoid the Ruptured effect. However, this is not true and the condition is always applied.