Angst Phantom

Phantom Form. Any non magic items pass through the Angst Phantom unless it chooses to come into contact with it.

Ethereal Sight. The Angst Phantom can see 60 feet into the Ethereal Plane when it is on the Material Plane, and vice versa.

Incorporeal Movement. The Angst Phantom can move through other creatures and objects as if they were difficult terrain. It takes 5 (1d10) force damage if it ends its turn inside an object.

Sunlight Sensitivity. While in sunlight, the Angst Phantom has disadvantage on attack rolls, as well as on Wisdom (Perception) checks that rely on sight.

Unusual Nature. The Angst Phantom doesn’t require air, food, drink, or sleep.

Undead Nature. The Angst Phantom regains 10 hit points at the start of its turn if it has at least 1 hit point and hasn’t been in sunlight or hit by magic in the last 5 minutes. If the Angst Phantom takes radiant damage, this trait doesn’t function at the start of the Angst Phantom’s next turn. The Angst Phantom is destroyed only if it starts its turn with 0 hit points and is not affected by its undead nature.

Spellcasting. The Angst Phantom casts one of the following spells, using Wisdom as the spellcasting ability (spell save DC 15):

Cantrips (at will): minor illusion, chill touch.

1st level (4 slots): detect magic, cause fear.

2nd level (3 slots): darkness, hold person, fly, silence.

3rd level (3 slots): dispel magic, vampiric touch, fear.

4th level (2 slots): blight, phantasmal killer.

Etherealness. The Angst Phantom enters the Ethereal Plane from the Material Plane, or vice versa. It is visible on the Material Plane while it is in the Border Ethereal, and vice versa, yet it can’t affect or be affected by anything on the other plane.

Multiattack. The Angst Phantom makes two claw attacks. It can use its Malevolent Words in place of one claw attack.

Claw. Melee Weapon Attack: +6 to hit, reach 5 ft., one target. Hit: 6 (1d6 + 3) slashing damage plus 10 (3d6) necrotic damage.

Malevolent Words. The Angst Phantom whispers words that travel to a target and inflict them with pain and turmoil. The target must roll a WIS DC 15 Saving throw. On a fail the target takes 22 (5d8) poison damage and is considered poisoned. On a success the target takes half damage.

Caster's Curse. The Angst Phantom can cause a spellcaster within 100ft. when they cast a spell against them and only if it can see them, to be paralyzed if they fail a WIS DC 15 saving throw. (1/day).