Tildwin's Psionic Guidence

You use your psionic talents to emit an aura that helps focus the minds of you alies and muddles the minds of your enemies. Each alied creature in a 10-foot sphere originating from you  has advantage on attack rolls and gains a bonus to damage rolls equal to your spell casting modifier and each enemy creature has disadvantage on attack roll and saving throw. This effect ends if you cast another spell of any kind.

At Higher Levels. When you cast this spell using a spell slot of 2nd level or higher, the sphere increases in size by 10 feet, for each slot level above 1st.