Craig's Grotesque Arm Growth

You choose a target creature within range. That creature makes a CON saving throw. On a failed save, the creatures arms grow to 10 feet in length. Their weight also quadruples, rendering the creature unable to cast spells requiring somatic components or make a melee and ranged attacks. On a successful save, nothing happens.

When casted at higher levels, this spell allows you target 1 additional creature per spell level.