Arcanist's' Lesson

Magic is a gift to be shared, the weave a blanket over all of existence, so why should we keep our knowledge locked in our minds when they could do so much more?

You enter an allied creature's mind and allow them to act as an arcane conduit for your own magic. The creature must be willing, and must be capable of casting 2nd level spells and below. You must be able to see the creature.
 
When you cast this spell, choose a 2nd level or lower spell that you know of and have prepared. While concentrating on this spell, the targeted creature may cast the chosen spell with their own spell slots as if they had that spell prepared, without any material or somatic components. If the chosen spell requires concentration, that spell's concentration is broken if either the targeted creature or you fail to maintain concentration. The spell uses their spell save DC and spell attack roll as necessary.

At Higher Levels. When you cast this spell using a spell slot of 4th level or higher, the amount of targets you can affect increases by 1 for every two slot levels above 3rd.