Title: MERCILESS

Wherever you go, you leave a trace of blood and corpses. As a result when you gain proficiency in intimidation, if you already have proficiency in intimidation you now have expertise. You score a critical hit on a roll of 19-20. If your critical threat range is 19-20 or higher already it increases by 1.

Absolute Terror

As a bonus action, you can target a creature that is within 60 feet of you, and already frightened of you,
and attempt to turn the fear in their heart into absolute terror. The target must make an Insight check
against your Intimidation roll. If you win, the target becomes paralyzed until the start of your next turn.
If the target wins, it becomes immune to this effect for 24 hours. 

The Thrill of the Kill

Whenever you kill a creature, your next attack during this or next turn has a +5 bonus to attack rolls and damage rolls.