band of elasticity

A small band made of a very flexible and stretchable material that always returns to its initial size. when stretched and released in a certain way it can be aimed and flung at a target the band then bounces several times of nearby surfaces seeming to gain momentum before returning to the users hand if free with. 

using a bonus action make a  ranged attack roll with prof bonus range 20,60 on a hit that beats the ac by at least two the band ricochets to a target with in 10 feet make a separate attack roll this attack deals +1 damage the band can then ricochet again dealing another +1 damage and so on until it fails to beat ac by 2 or more. damage is 1d4-3 for first 1d4-2 for second and so on baring crits.

on a nat 20 attack auto ricochets' and the +1 modifier of the next ricochet is increased to +2 instead of another benefit.

the band can not ricochet to any given creature more than once including initial target and does not need line of sight between targets to ricochet except for the initial target. 

The band doesn't immediately return to the user (recharge on 4,5,6 of a d6 rolled at the end of your turn)

Proficiency with a Dart allows you to add your proficiency bonus to the attack roll for any attack you make with it.

Notes: Replace Damage Type: Bludgeoning, Finesse, Thrown, Vex