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 made with this weapon, the target takes an extra 7 bludgeoning damage, or 14 bludgeoning damage if it's a construct. If a construct has 25 hit points or fewer after taking this damage, it is destroyed.
Proficiency with a mace allows you to add your proficiency bonus to the attack roll for any attack you make with it.
Notes: Bonus: Magic, Damage, Combat, Bane