Legendary Resistance (3/Day). If Eli van Hassen fails a saving throw, it can choose to succeed instead.

Darklord's Curse. Eli’s “powers” are not truly his own but represent the land reacting to protect him (although, for all mechanical purposes, they are his powers and expend his actions) and as such, his spells are usually reserved his lair actions. When this happens, he must make a deception check against the players' passive perception or a contested check against a players' perception or insight check who request it to gauge his surprise.

Additionally, the spells cast in this way cannot be countered by spells or effects as they are considered natural phenomena of the Domain of Dread itself.

Lastly, if Eli van Hassen dies he rapidly begins to decompose and the land swallows him up. Eli van Hassen wakes the following morning in his bed with a full bill of health, missing the memory of his death but not the events leading up to it. The only thing that can truly end Eli's life is beheading by the Headless Horseman, at which point the Domain of Dread begins to collapse upon itself.

False Advisor. When Eli van Hassen is within 60 feet of Acerrubrum, his Eladrin advisor (appointed by the Domain of Dread), when he makes a melee weapon attack, it automatically fails, wasting his action much to his surprise.

Cringe and Cower. When Eli van Hassen has at least 2 allies within 10 feet, he gains advantage on saving throws and attack rolls made against Eli have disadvantage.

Stay Away From Me. Unless Eli van Hassen's movement speed is 0, he will always use as much of his movement on his turn as he can to keep at least 10 feet away from a hostile creature.

Fey Blessing. Eli van Hassen's AC includes his Charisma modifier. Additionally, his Charisma modifier is added to his melee attack and damage rolls instead of his usual modifiers.

Multiattack.  Eli makes three Dagger attacks and uses Fickle Fortune.

Dagger. Melee or Ranged Weapon Attack: +12 to hit, reach 5 ft or range 20/60, one target.  Hit: 6 (1d4+6) piercing damage plus 3 (3d6) psychic damage.

Fickle Fortune.  Ranged Spell Attack: +12 to hit, range 30 ft, one target.  Hit: 27 (5d10) psychic damage, and afflict the target with one of the following (roll 1d6):  

• 1-3: Target is knocked prone.
• 4-5: Target's speed is halved until the end of their next turn.
• 6: The target is affected as though by the Slow spell until the end of their next turn. (-2 AC and Dex saves, can't use reactions. On their turn, can either use an action or bonus action, but not both. Regardless of their abilities or magic items, they can't make more than one melee or ranged attack during their turn. If they attempt to cast a spell with a casting time of 1 action, roll a d20. On an 11 or higher, the spell doesn't take effect until their next turn, and they must use their action on that turn to complete the spell. If they can't, the spell is wasted.)

Foul Fortune (Recharge 5-6).  Eli van Hassen targets a point within 60 feet.  Creatures in a 15 foot radius of that point must make a DC 20 Con save or suffer the effects of Fickle Fortune, above. Creatures that succeed on their Con save take half of the psychic damage but no additional effects.

Spellcasting. Eli van Hassen casts one of the following spells, using Charisma as the spellcasting ability (spell save DC 20):

At will: animal messenger, druidcraft, infestation, locate object, mending, vicious mockery (3d4)

3/day each: earthbind, fog cloud, skywrite

2/day each: shield (see reactions), wall of thorns, warding wind

1/day each: call lightning, heroes' feast

Let None Touch Me. Eli van Hassen targets an ally within 60 feet of him. That ally uses their reaction to move up to their speed towards Eli.

Oh Gods, Save Me! Eli van Hassen casts the shield spell, however, instead of an invisible barrier of magical force, it is a semi-permanent element of nature manifesting to protect him; a thin slab of stone erupts from the ground interposing the attack, a flock of geese swarm the space and intercept each hit and drop to the ground dead, a bramble thicket instantly grows encasing Eli in a protective umbrella, etc. If Eli moves away from the space this reaction spell was cast, he no longer receives the benefit of the spell for its duration.

Slink Away. Eli van Hassen moves up to his movement speed. This movement does not provoke opportunity attacks.

Filthy Peasant. Eli van Hassen casts vicious mockery (3d4)

Woe is Me (Costs 2 Actions). Every creature that has made an attack roll against or dealt damage to Eli van Hassen since the end of his turn must make a DC 20 Wisdom saving throw or take 16 (3d10) psychic damage and must then use their reaction to move up to their speed away from Eli van Hassen. On a success, they take half damage and aren't forced to move.

Twist Fortune (Costs 3 Actions). Eli van Hassen recharges and immediately uses Foul Fortune.