Auspicious Warning

1st-level enchantment (temporal)

Casting Time: 1 reaction, which you take when an ally makes an attack roll, ability check, or saving throw
Range: 30 feet
Components: V
Duration: Instantaneous

Just in time, you call out a fortunate warning to a creature within range. The target rolls a d4 and adds the number rolled to an attack roll, ability check, or saving throw that it has just made and uses the new result for determining success or failure.