Chain Of Flesh

You create an illusionary chain made of what appears to be flesh that attaches to the heart of the target, all within 10ft of the target, including the target, must make a wisdom saving throw or attack the chain. If any effected by the spell succeeds they are immune for 24 Hours. 

All damage done to the chain will transfer to the target. Should the chain be undamaged at the start of your next turn you can use a bonus action to deal 4d8 necrotic damage, gaining the same amount as temporary HP. You also use your bonus action to change the target to anyone within the area of the spell. 

For each level casted above level 7 you can increase the range of the 30 ft and 10 feet