Rift Sheath (Shortsword)

This dark, wooden staff is actually a two-sided sheath for a pair of equally dark shortswords. While holding the staff with two hands, you can use a bonus action to twist the staff to sheath or unsheath the two swords from it. When unsheathing the swords, the wooden sheath is shunted into a special extradimensional space until you decide to sheath the swords again, at which point it magically reappears between the swords. The weapon has the following properties depending on whether the swords are sheathed as a quarterstaff or unsheathed as a pair of shortswords.

Quarterstaff: While wielded as a quarterstaff, you gain a +1 bonus to attack and damage rolls made with this magic weapon, which has the finesse property. While holding it, you can use a bonus action to speak the staff's command word to create a spatial rift around you that lasts as long as you concentrate (as if concentrating on a spell), up to 1 minute. For the duration of the rift, other creatures within 15 feet of you must spend 2 feet of movement for every 1 foot they move. Once this property has been used, it can't be used again until the next dawn.

Shortswords: These magic shortswords have the thrown property with a normal range of 15 feet and a long range of 30 feet. Hit or miss, the shortsword vanishes in a mirage-like distortion and immediately reappears in your hand after the attack. When you hit with a ranged attack using one of the swords, you can use your reaction to teleport to an unoccupied space that you can see within 5 feet of the target. When you do, you have advantage on the next attack roll you make against that target before the end of your next turn. Once this property has been used, it can't be used again until 1 hour has passed.

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.

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

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.

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