Greater Silver Sword

This magic weapon grants a +3 bonus to attack and damage rolls made with it. While you hold the sword, you have advantage on Intelligence, Wisdom, and Charisma saving throws, you are immune to being charmed, and you have resistance to psychic damage. In addition, if you score a critical hit with it against a creature's astral body, you can cut the silvery cord that tethers the target to its material body, instead of dealing damage.

Two-Handed: This weapon requires two hands when you attack with it.

Heavy: Creatures that are Small or Tiny have disadvantage on attack rolls with heavy weapons. A heavy weapon's size and bulk make it too large for a Small or Tiny creature to use effectively.

Proficiency: martial, greatsword Source: Mordenkainen's Tome of Foes p. 89