As a Bonus Action, you can make one ranged attack with a weapon and one melee attack using the Bludgeon property of that weapon. You can move between these attacks. If you hit a Large or smaller creature with both attacks, it has the Prone condition.
Once you use this feature, you can't use it again until you finish a Short or Long Rest. You can also restore your use of it by expending two Risk Dice (no action required).