Umbral Agony

The next time you hit a creature with a weapon attack before this spell ends, the umbral energy and ink write the wound into the body of the creature. The creature must make a Intelligence saving throw to dissipate the illusory branding of an umbral scar. While branded by Umbral Agony the creature has disadvantage on all Intelligence based checks (i.e. Arcana, Investigation) and Constitution saving throw (Concentration Check)

While branded by this spell, the target takes one roll of the melee weapon damage die + 1d6 psychic damage at the start of each of its turns. The creature can make a Intelligence saving throw at the end of each of its turns to remove the scar. 

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