Accuracy

You touch one willing creature. Once before the spell ends, the target can roll a d4 and add the number rolled to one attack roll of its choice. It can roll the die before or after making the attack roll. The spell then ends.

This bonus increases by one dice size when you reach 5th level (1d6), 9th level (1d8), 13th level (1d10) and 17th level (1d12).