Angmarl

Shadow Form. Angmarl  can enter a hostile creature's space and stop there. He can move through a space as narrow as 1 inch wide without squeezing.

Shadow Stealth. While in dim light or darkness, Angmarl can take the Hide action as a bonus action.

Shade of Knight, Knight of Shades: Angmarl can possess an armor and use it like his physical body. Angmarl can use a bonus action to equip or unequip, attune or break attunement with any number of weapons, armors or shields. If the magic item require a specific condition for its attunement, he can ignore it for 1 minute. While using this feature, Angmarl loses his immunity in Grappled, Prone and Restrained.

While wearing an armor, Angmarl cannot use Life Drain but gains proficiency with improvised weapons and these benefit instead, depend on the armor he use:
Light Armor. Angmarl gains proficiency with simple weapon, shortsword and any kind of ranged weapon, his walking speed increase to 60ft also he can make 5 weapons attacks each turn when he takes Attack Action and gain Avoidance feature.
Medium Armor. Angmarl's Strength become 20 and his Dexterity reduces to 20. He gains proficiencies with simple, martial weapons and shield. He can make up to 4 weapon attacks each turns when he takes Attack Action and his weapon attacks score a critical hit on a roll of 19 or 20.
Heavy Armor. Amgmarl's Strength become 26 and his Dexterity reduces to 10 and he can't fly. He gains proficiencies with any simple, martial weapons and shield. He can make up to 3 weapon attack per turn when he takes Attack Action, he can also wield a Heavy weapon with one hand without disadvantages.

Gargantuan Nature. Angmarl's weapon attack deal thrice number of dice.

Magic Weapon. Angmarl's weapon attacks are magical.

Multiattack. Angmarl uses Abyssal Presence and makes 3 weapon attacks.

Life Drain. Melee Weapon Attack: +14 to hit, reach 5 ft., one creature. Hit: 26 (4d8 + 8) necrotic damage, and the target's Constitution score is reduced by 1d4. The target dies if this reduces its Constitution to 0. Otherwise, the reduction lasts until the target finishes a short or long rest.

If a living creature dies from this attack, a new shade rises from the corpse 1d4 hours later.

Abyssal Presence. Each creature of the Angmarl's choice that is within 120 feet of the him and aware of him must succeed on a DC 20 Wisdom saving throw or become frightened for 1 minute. A creature can repeat the saving throw at the end of each of its turns, ending the effect on itself on a success. If a creature's saving throw is successful or the effect ends for it, the creature is immune to the Angmarl's Abyssal Presence for the next 24 hours.

Possession (1/day). One living creature that Angmarl can see within 5 feet of him must succeed on a DC 20 Charisma saving throw or be possessed by him; he then disappears, and the target is incapacitated and loses control of its body. Angmarl now controls the body but doesn't deprive the target of awareness. He can't be targeted by any attack, spell, or other effect, and he retains his alignment, Intelligence, Wisdom, Charisma. He otherwise uses the possessed target's statistics, but doesn't gain access to the target's knowledge, class features, or proficiencies. But if it can wear armor, Angmarl can still gains benefit (but not the stat changes) of Shade of Knight, Knight of Shades.

The possession lasts until the body drops to 0 hit points, Angmarl ends it as a bonus action, or he is forced out by an effect like the dispel evil and good spell. When the possession ends, he reappears in an unoccupied space within 5 feet of the body. The target is immune to his Possession for 24 hours after succeeding on the saving throw or after the possession ends.