Defile

You burn the ashes within your hand, and as they burn a circle (10 foot diameter) appears at a location of your choosing within range. Gray sludge rises from the ground beneath all living things within the area.

All creatures within the circle must make a DEX Saving Throw to escape the circle. A failed save results in the creature taking 9d10 Necrotic damage and a curse being placed on the target, giving them disadvantage on all ranged attack rolls until the curse is dispelled or removed. Upon a successful saving throw, the creature takes half as much damage and receives no curse as they quickly jump out of the gray area on the ground. 

This spell provides no opportunity for reaction.