Bone Shackles

the caster targets a enemy with in sight and summons chains of bone filled with necrotic energy to bind the targets legs to the ground. if the target is in the air ( max reach 60ft ) the chains brings the target slamming to the ground. if a creature is brought to the ground by this spell the target take 1d6 damage for every 10 feet the creature is pulled to the ground. If the caster loses sight of the enemy the target is released from the from the spell.

At higher levels the duration of the spell is increas. level 5  ( 3 minutes) level 7 (4 minutes) level 9 ( 5 minutes)