Unbound Strength (5e Feat)
From D&D Wiki
Prerequisites: Strength score 13 or higher
You have broken the limits for how much power you can put into your swings. You gain the following benefits:
- You can use your bonus action to prepare a heavy strike, when wielding a weapon with the heavy property. When you do so, your next attack with that weapon doubles your Strength modifier to the damage, on a hit.
- When you hit a creature using a weapon that have the heavy property, you can Shove that target using your reaction. You can attempt to shove a creature up to two size categories higher than you with this reaction.
- Creatures one size larger than you don't have advantage on contested Strength checks due to their size.