You can increase the force of gravity applied on your foes, you gain the following benefits:

• Your Constitution, Charisma, Intelligence or Wisdom score increases by 1 to a maximum of 20.
• When you strike you can cause gravity to increase with each of your blows. When you make a weapon attack against a creature, you can cause its speed to be reduced by 5 feet until the start of your next turn every time you hit it.