Your lifeforce has been touched by the fell hand of a god of death, perhaps the Raven Queen, or Kelemvor. The coldness of eternal rest infuses your soul and lends you its peace. Death is a friend to you, not something to be vanquished, Maybe you long for the day you slip between the cracks of the world, or you await it with trepidation, but the fact remains the same; all will die eventually. This is your truth.

Prolong

 When you reduce a creature within 5 feet of you to 0 hit points, you gain temporary hit points equal to your Wisdom modifier + your monk level (minimum of 1 temporary hit point).

The One Truth

As an action, you speak the One Truth. Each creature within 30 feet of you that can see you must succeed on a Wisdom saving throw or be frightened of you until the end of your next turn.

Eleventh Hour

When you are reduced to 0 hit points, you can expend 1 ki point (no action required) to have 1 hit point instead.

Touch of the Inevitable

As an action, you touch one creature within 5 feet of you, and you expend 1 to 10 ki points. The target must make a Constitution saving throw, and it takes 2d10 necrotic damage per ki point spent on a failed save, or half as much damage on a successful one.