Davriel's Shadow Fugue

You target a spell caster you can see within range.  Choose a spell they can cast from 3rd level and down. You may now cast that spell without material components for the next 5 hours. They cannot cast that spell for the next five hours. You take 1d4 psychic damage every time you use the chosen spell. It does not count toward total spells known, and you cast it as though it were a spell of your class type.