Tutor

You assist in the course of an action or downtime activity by proving instruction on the proper technique or form of said action or activity. You magically assist a willing creature you can see within range that can hear and understand you. Creatures that can't be charmed are immune to this effect. The suggestion must be worded in such a manner as to make the course of action sound reasonable. Asking the creature to stab itself, throw itself onto a spear, immolate itself, or do some other obviously harmful act ends the spell.

When used to aid in downtime activities it adds a +4 to the roll to perform the task. If the creature succeeds on its downtime roll with the aid of the caster the creature only gains the normal amount of progress on its downtime activity. If the creature rolled a successful downtime activity roll without the aid of the caster, the caster may roll an INT saving roll to add 1d12 to the creatures progress, and half on a failed saving roll.  

The spell may be used to give advantage on an attack or saving roll if cast before the target performs the roll. Tutor cannot be applied retroactively.