Braum's time wipe

You target up to 5 creatures you can see in range. All of them must make a WIS saving throw, or be mentally aged 1,000 years over and over again in an instant. On a failed saving throw, the targeted creatures take 5d12 psychic damage and be stunned for a turn, or half as much on a save and not stunned. 

If casted at higher levels, it allows you to target target an additional creature and deal an additional 1d12 for each spell slot over 5th.