Dagger of Long Shadow

Weapon (dagger), uncommon (requires attunement) You gain a +1 bonus to attack and damage rolls made with this magic weapon. When wielding this weapon, you can spend a bonus action to activate the weapon’s special feature, extending the range of existing shadows surrounding you. You and any creature within 5 feet of you gains advantage to Dexterity (Stealth) checks made in dim light. This effect lasts for one minute and doesn't work in complete darkness. Once this effect is used, a long rest must be completed before it can be used again.