PHB, page 248
Guidance
0-level (Cantrip) Divination
Casting Time: 1 action
Range/Area: Touch
Components: V, S
Duration: Concentration, up to 1 minute
You touch one willing creature. Once before the spell ends, the target can roll a d4 and add the number rolled to one ability check of its choice. It can roll the die before or after making the ability check. The spell then ends.
At higher levels: The range of the spell becomes 10 feet once you reach 5th level, and increases by 10 feet at 11th level (total of 20) and again at 17th level (total of 30).
Available for: Artificer, Cleric, Druid