Wondrous Item, Artifact, Weapon (Dagger), Requires Attunement
You have a +1 bonus to attack and damage rolls made with this magic weapon.
Keening's Sting: Upon a hit, roll a 1d6 to select an ability score. (1 = STR, 2 = DEX, 3 = CON, 4 = INT, 5= WIS, 6 = CHA). Afterward, roll another 1d6. That amount is reduced from the target's selected ability score. This debuff can only be removed by a cast of remove curse or lesser restoration.
Kagrenac's Tools: If attuned and wielded without Wraithguard equipped, the wielder must make a DC 17 Constitution Save. On a failure, the wielder instantly drops to 0 HP, is considered unconscious, but does not make death saves. On a success, the wielder takes 2d10 damage. This save repeats every minute the wielder continues to wield Keening without Wraithguard.
If all three of Kagrenac's Tools are equipped, their bonuses all improve from +1 to +3.
Proficiency with a dagger allows you to add your proficiency bonus to the attack roll for any attack you make with it.