When you hit with an attack using this magic sword, the target takes an extra 1d6 acid damage.
When you strike an enemy with this blade it permanently lowers the opponents AC by 1d4. This does not remove the AC bonus that certain spells give creatures like Shield and Shield of faith. You can only reduce its AC once per round and to a limit of 14.
If you are using this blade you against a creature with resistance to acid damage you ignore the resistance and immunities.
Proficiency with a Greatsword allows you to add your proficiency bonus to the attack roll for any attack you make with it.
This weapon has the following mastery property. To use this property, you must have a feature that lets you use it.
Graze. If your attack roll with this weapon misses a creature, you can deal damage to that creature equal to the ability modifier you used to make the attack roll. This damage is the same type dealt by the weapon, and the damage can be increased only by increasing the ability modifier.
Notes: Damage: Acid, Ignore: Dual Wield Modifier Restrictions, Bonus: Melee Attacks, Damage, Combat, Warding, Heavy, Two-Handed, Graze