Titan's Tooth Claymore

This massive two-handed blade is made from the lost or harvested tooth of a tarrasque. You gain a +2 bonus to attack and damage rolls made with this magic weapon. If it hits an object, the hit is automatically a critical hit. In addition, if you roll a 20 on an attack roll using this weapon, the target takes an extra 2d6 slashing damage.

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.

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

Proficiency: martial, greatsword Source: The Griffon's Saddlebag: Book Two p. 175 (Third Party)