And Stay Down

You are a master of brutally slamming your opponents to the ground, granting you the following benefits:

• Increase your Strength or Dexterity by 1, to a maximum of 20.
• Creatures that you knock prone must use all of their movement to stand up, rather than half.
• When you either restrain or knock a creature prone, they must make a Constitution saving throw equal to 10 plus your Strength modifier plus your proficiency bonus. On a failed save, a Large or smaller creature is stunned until the end of their next turn.