Grasping Arrow
When this arrow strikes its target, conjuration magic creates grasping, poisonous brambles, which wrap around the target. The creature hit by the arrow takes an extra dice:2d6|noform|noparens|avg (2d6) poison damage, its speed is reduced by 10 feet, and it takes dice:2d6|noform|noparens|avg (2d6) slashing damage the first time on each turn it moves 1 foot or more without teleporting. The target or any creature that can reach it can use its action to remove the brambles with a successful Strength (Athletics) check against your Arcane Shot save DC. Otherwise, the brambles last for 1 minute or until you use this option again.
The poison damage and slashing damage both increase to dice:4d6|noform|noparens|avg (4d6) when you reach 18th level in this class.
Sources
Xanathar’s Guide to Everything p. 29