From D&D Wiki
|Casting time:||1 action|
Make A creature of you choice to think they are in a life threatening situation. If they are made believe they died there they take 3d4 mental damage if it is cast on any creature they must make a saving throw of intelligence 18.
At Higher Levels. When you cast this spell using a spell slot of 10th level or higher you may cast it up to three times before taking a short rest
For information on class go to https://www.dandwiki.com/wiki/Mage,_5E