How about being able to ring someones bell in DnD 5e?
You have a mighty swing when you put your back into it. Gain the following:
- Increase your strength or dexterity by 1 to a maximum of 20.
- When you make a melee attack, you may take a -5 penalty on the roll. If you do take a penalty and you hit the target, the target must make a Constitution saving throw with the DC equal to 8 + you strength or dexterity bonus plus your proficiency bonus or be stunned for one round.