Item: whip or chain
The damage die of this magic whip becomes a d10, and once
per turn when the wielder hits a Large or smaller target with
a Power Whip attack, they can force it to make a Dexterity
saving throw or be knocked prone.
At 11th level, this weapon gains a +1 bonus to its attack
and damage rolls. This bonus increases to +2 at 17th level.