Mace of Disruption

When you hit a fiend/undead with this magic
weapon, the creature takes an extra 2d6 radiant
dmg. If the target has 25 hit points or less after
taking this damage, it must succeed a DC 15 WIS
saving throw or be destroyed. On a successful
save, the creature becomes frightened of you
until the end of your next turn.
While you hold this weapon, it sheds bright
light in a 20-ft radius and dim light for an
additional 20 ft.