Invisible Weapon is a passive feature that prevents the wielder from being disarmed, until it becomes visible on a missed attack.
Description
This weapon is 
while equipped. It has 
Advantage on 
Attack rolls. It loses this property for 2 rounds on a missed Attack roll. The weapon also scores a critical hit when rolling a 19.
Condition: Invisible Weapon
- Affected entity can't be disarmed. It has Advantage on Attack rolls. It scores a critical hit when rolling a 19.
How to learn
Granted by the weapons:
Notes
- Prior to Patch #6, this feature did not actually prevent disarming.