Evil Weapon has these relationships to other tropes:

parents kids shares a parent with:
Artifact Of Doom
Empathic Weapon
Good Weapon Evil Weapon
parent child
Artifact Of DoomTome Of Eldritch Lore
''Artifact Of Death
''Unholy Holy Sword
''Summoning Artifact
''Evil Mask
Empathic WeaponTalking Weapon
''Sentient Vehicle
You'll need to Get Known if you want to add or modify these relationships.