Blessing

You bless one creature within range. Whenever a target makes a D20 test before the spell ends, the target can  add a +1 bonus to the roll.

At Higher Levels.

At 5th level the duration is extended to 10 minutes, and may affect up to three targets simultaneously.

At 11th level the bonus increases to +2, the duration lasts one hour and may affect up to eight targets.

At 17th level the bonus increases to +3, the duration lasts a full day and may affect up to 35 targets.