Weapon (Mace), Rare, 8,000 gp
You gain a +1 bonus to attack and damage rolls made with this magic weapon. The bonus increases to +3 when you use the mace to attack a Construct.
When you roll a 20 on an attack roll with this weapon, the target takes an extra 2d6 bludgeoning damage, or 4d6 bludgeoning damage if it’s a Construct. If a Construct has 25 HP or fewer after taking this damage, it is destroyed.