ability
Tavern Brawler
Improve unarmed fighting and make practical use of improvised weapons.
Origin feat.
Your damaging Unarmed Strike can deal 1d4 plus your Strength modifier in Bludgeoning damage instead of its usual damage. When an Unarmed Strike's damage die shows 1, you may reroll that die and must use the replacement result.
You gain proficiency with improvised weapons.
Once per turn, when your Unarmed Strike hits a creature as part of the Attack action on your turn, you can both deal its damage and push that creature 5 feet away from you.