Arcane Blast

A beam of arcane energy streaks toward a creature within range. Make a ranged spell attack against the target. On a hit, the target takes 2d10 force damage.

The spell marks the target with an arcane sigil that makes easier to hit the same target on the next turn. If the target doesn't get hit by the same spell on the next turn, the sigil desappears. But if the target are attacked by the same spell, the spellcaster has advantage on that attack roll. On a success the target take 2d10 additional force damage. 

At Higher Levels: When you cast this spell using a spell slot of 3nd level or higher, the damage increases by 1d10 for each slot level above 4rd.