Although the strength of the pact is still in question, the loss of a contractor is still a huge blow to reputation.
So in difficult times, when life is bordering on death, prove your faith with the blood of your enemies or your own and give your innermost thoughts to the Old One for a feast and speak their words in the language of the eldritch, which can only be heard by those who dare to infringe on their property.
You deal 1d4 psychic damage and are guaranteed to impose deafness and fright as a reaction to receiving damage that reduces hp for more than a half. If the enemy is killed prior to the end of the spell concentration - you can cast it again using bonus action on a creature within 10 feet without using any components but deafness and fright are now bound to an intelligence saving throw.
On higher levels, this spell deals an additional 1d4 psychic damage and increases the time of concentration by half a minute and range by 2 feet.