Dragonic Roar

You conjure energy to your vocal cords, giving you the fearsome power of a dragons roar. Make a ranged spell attack against the target(s). On a hit, the target takes 5d6 Thunder damage, and the target has to make a CON saving throw, if they fail, they have Dis on all Attack Rolls till the end of the spellcasters next turn.

At Higher Levels.
When you cast this spell using a spell slot of 3rd level or higher, the damage increases by 1d6 for each slot level above 2nd.