Death Threat

Sorry if the Description is a little hard to understand it is my first time making a home-brew spell.

When someone touches you,you can react by casting death threat where they see an image of themselves missing the top half of their body and you must roll intimidation with advantage.

If they attempt to attack you with a melee weapon you roll perception if you arent aware of them,once you are aware if they are within range you may react with death threat.

If you are successful then they must make a constitution saving throw.If they fail then they cancel their attack and retreat half their walking speed.

If casted on a monster they view themselves with a decapitated head.