Disdain for the weak

The caster gazes upon those he considers weak, and checks level. If the sorcerer's level is higher than the targets, they roll a save at disadvantage for constitution. If they succeed, they are stunned for 1 round giving other attackers advantage, and if they fail, they are held immobile as long as the caster maintains concentration. Every other round held targets get to roll a new saving throw with the same criteria to see if they can break free of the submission. If the sorcerer's level is equal, the save is rolled normally, and if the sorcerer's level is lower, then the save is rolled at advantage.

Once the caster hits level 13, the spell becomes more powerful, and can affect all targets that can hear the sorcerer's voice.The caster can choose to not affect some people with this shout, but must take a round to mentally sort through potential targets to make exceptions. However, in the area version, all targets roll with neutral or advantage saving throws, depending on level comparison, and are not stunned upon a successful saving throw. All targets that fail are still held as long as the caster maintains concentration. 

Also at level 13, the caster can still use the single target version of this ability, with enhanced effects. The target will roll the save at disadvantage or neutral depending on level comparison, and upon success are stunned for 1d4 rounds. Those who fail are held, and also take 1 point of damage every round They are held. They can reroll their saving every third round to attempt to break free.