Chaos Reach

You send forth necrotic energy in a 5ft by 70ft line, hitting everything in the area. Creatures must max a Dexterity saving throw against your spell save DC. On a fail, the receive 10d6 points of necrotic damage and are restrained until they use a main action Strength check against your spell save dc to break out. On a success they only take half as much and aren’t restrained. Ally creatures in the target range take half as much on a fail and are restrained, but on a success take no damage.