Staggering Blow (5e Feat)
From D&D Wiki
Prerequisites: Strength 13 or higher
Your attacks can daze and let your opponents shaken. You gain the following benefits:
- When you roll a critical hit with a melee weapon attack with Strength, the target must make a Constitution saving throw against a DC equal 8 + your proficiency bonus + your Strength modifier, or be stunned until the end of your next turn.
- When you hit a creature with a melee attack roll using Strength, you can decide to not apply your modifier to the damage. When you do so, the movement speed of the creature is reduced to half until the end of your next turn.