Grim Hollow Transformation: The Specter Level 4

TRANSFORMATION LEVEL 4

When your transformation reaches this level, you can choose one of the following transformation boons.
If you wish, you can select a boon from levels 2 or 3 instead.
You also gain this level's transformation flaw.

TRANSFORMATION BOON
CALL OF UNMAKING

As a bonus action, you reveal your Hideous Appearance give a mournful wail or otherwise set up a wracking vibration.
This sound has no effect on constructs and undead.
All other creatures of your choice within 30 feet of you must make a Constitution saving throw.
Creatures that can't hear you have advantage on the saving throw.
On a failed save, the creatures bears the mark of unmaking for the next minute.
While bearing this mark, a creature takes an additional 1d6 necrotic damage each time it takes damage.
Once you use this boon, you can't use it again untill you finish a long rest.

TRANSFORMATION BOON
POSSESSION

As an action, you reveal your Hideous Appearance and enter the space of a humanoid or beast and force that creature to make a Charisma saving throw.
If the target fails, you disappear, and the target is incapacitated and loses control of its body.
You control the body without depriving the target of awareness.
While possessing a target, you can't be targeted by any attack, spell, or other effect.
You retain your alignment, Intelligence, Wisdom, Charisma, and any immunity to being charmed or frightened.
Otherwise, you use the possessed target's statistics but don't gain access to the target's knowledge, class features, and proficiencies.
The possession lasts until the possessed target drops to 0 hit points, you end it as a bonus action, or until you are forced out by an effect that ends possession.
When the possession ends, you reappear in an unoccupied space within 5 feet of the body.
You can use this boon again only after you finish a short or long rest.

TRANSFORMATION BOON
ETHEREAL DENIZEN

You can sense invisible creatures and objects, and those in the nearby Ethereal Plane, as if you are always under the effect of the see invisibility spell.
Additionally, you can use an action to cast the etherealness spell without expending a spell slot.
Once you cast the spell using this boon, you can't do so again until you finish a short or long rest.

TRANSFORMATION FLAW
PULL OF OBLIVION

Dissolution pulls on your body and soul.
Whenever you roll a natural 1 on a saving throw against an effect that deals you damage, you lose 1d6 hit points per two levels you have as thE afterlife or your lack or reality pulls you toward nothingness.
If you die, your body disappears, and you can be raised from the dead only with a wish spell or true resurrection spell.
If you and the GM agree, you might instead become an NPC monster under the GM's control, such as a wraith or a bizarre space-time aberration.