Riff's Dimensional Ripper

This roughly forged dagger of goblin make has somehow been enchanted with weak, planar magic. This magic dagger has 4 charges and regains 1d4 expended charges daily at dawn. While holding the dagger within 5 feet of a creature at least one size larger than you, you can use an action to expend 1 of the dagger's charges to create and slip through a brief, planar tear, reappearing in an unoccupied space within 5 feet of the creature on the opposite side of it. When you do, you can immediately make one weapon attack with this dagger against that creature. If the attack hits, that creature takes an extra 1d6 force damage and can't take reactions until the end of your turn. If using the dagger in this way would cause you to move more than 20 feet, you are shunted out of the planar tear and reappear in your original space instead. When this happens, you take 4d6 force damage, and the action is wasted.

Finesse: When making an attack with a finesse weapon, you use your choice of your Strength or Dexterity modifier for the attack and damage rolls. You must use the same modifier for both rolls.

Thrown: If a weapon has the Thrown property, you can throw the weapon to make a ranged attack. If the weapon is a melee weapon, you use the same ability modifier for that attack roll and damage roll that you would use for a melee attack with the weapon. For example, if you throw a handaxe, you use your Strength, but if you throw a dagger, you can use either your Strength or your Dexterity, since the dagger has the Finesse property.

Range: A weapon that can be used to make a ranged attack has a range shown in parentheses after the ammunition or thrown property. The range lists two numbers. The first is the weapon's normal range in feet, and the second indicates the weapon's maximum range. When attacking a target beyond normal range, you have disadvantage on the attack roll. You can't attack a target beyond the weapon's long range.

Light: A light weapon is small and easy to handle, making it ideal for use when fighting with two weapons.

Proficiency: simple, dagger Source: The Griffon's Saddlebag: Book Two p. 144 (Third Party)