Soul Mates. Each Krezkin Monk is soul-stitched to its mate. They share a psychic link and each can perceive everything the other perceives. When one is injured, they both feel pain. They are of a single mind, and refer to themselves and their mate as a singular being. They also share a pool of HP, and when that pool of HP reaches zero, both units of the pair die regardless of which received the killing blow.

Immutable Form: The Krezkin Monk is immune to any spell or effect that would alter its form.

Aversion of Fire: If a Krezkin Monk takes fire damage, it and it's Soul Mate have disadvantage on attack rolls and ability checks until the end of its next turn.

Lightning Absorption: Whenever a Krezkin Monk is subjected to lightning damage, it takes no damage and instead regains a number of hit points equal to the lightning damage dealt.

Multiattack. The Krezkin Monk makes two unarmed strikes.

Unarmed Strike. Melee Weapon Attack: +4 to hit, reach 5 ft., one target. Hit: 6 (1d8 + 2) bludgeoning damage plus 9 (2d8) psychic damage. This is a magic weapon attack.

Innate Spellcasting: The Krezkin Monk's innate spellcasting ability is Constitution. It can innately cast the following spells, requiring no components: 

At will: Word of Radiance

1/Day: Shroud of Souls (Bonus Action): The Krezkin Monk and its Soul Mate call forth spirits of the dead, which flit around it and it's Soul Mate for the spell’s duration. The spirits are intangible and invulnerable.

Until the effect ends, any attack it makes deals 1d8 extra damage when it hits a creature within 10 feet of it. This damage is radiant. Any creature that takes this damage can’t regain hit points until the start of the Krezkin Monk's next turn.

In addition, any creature of it's choice that it can see that starts its turn within 10 feet of it has its speed reduced by 10 feet until the start of the Krezkin Monk's next turn.

Shroud of Souls: The Krezkin Monk and its Soul Mate call forth spirits of the dead, which flit around it and it's Soul Mate for the spell’s duration. The spirits are intangible and invulnerable. This can be done on either Mate's turn, but requires the use of each of the pairs Bonus Action.

Until the effect ends, any attack it makes deals 1d8 extra damage when it hits a creature within 10 feet of it. This damage is radiant. Any creature that takes this damage can’t regain hit points until the start of the Krezkin Monk's next turn.

In addition, any creature of it's choice that it can see that starts its turn within 10 feet of it has its speed reduced by 10 feet until the start of the Krezkin Monk's next turn.

Reaction Name. Whenever the Krezkin Monk takes fire damage, it and its Soul Mate can each move up to half its speed as a reaction, without provoking opportunity attacks.