Skullhammer

Requires attunement. When attacking with this weapon, you add your proficiency bonus to damage rolls instead of attack rolls. Attacks with this weapon deal double damage to objects and structures.
When you use the Attack action on your turn and hit a Small or smaller creature with the skull hammer, you can send that creature flying. It must succeed on a DC 15 Strength saving throw or be thrown 10 feet directly away from you and land prone.