Apostle of Fire

Traveler of Skies. While in the air, the Apostle of Fire has advantage on Wisdom (Perception) checks regarding her surroundings.

Spellcasting. The Apostle is a 9th level spellcaster. Their spellcasting ability is Charisma (spell save DC 15, +7 to hit with spell attacks). She knows the following spells and can cast them, requiring no material components:

Cantrips (At Will): fire bolt, produce flame, vicious mockery

1st level (4 slots): faerie fire

2nd level (3 slots): enthrall, hold person

3rd level (3 slots): fear, hypnotic pattern, fireball

4th level (3 slots): compulsion, confusion, phantasmal killer, dimension door

5th level (1 slot): flame strike

Multiattack. The Apostle of Fire can cast two cantrips or cast one cantrip and use the Elemental Deprivation.

Elemental Deprivation. The Apostle of Fire chooses one point within 60 feet of her and then one of the following damage types: cold, fire or lightning. The elemental balance in the 30-foot radius from the chosen point becomes disturbed, making anyone entering it vulnerable to this element. If the creature has resistance to it from any source, this effect negates it, making the creature vulnerable. Additionally, any creature entering or starting their turn in that area must succeed on a DC 14 Constitution saving throw or take 7 (2d6) damage of that type. This area effect ends when the Apostle leaves the 60-foot range.

Leadership. The Apostle can utter a special command or warning whenever a nonhostile creature that they can see within 60 feet makes an attack roll or a saving throw. The creature can add a d4 to its roll. The creature can benefit only from one Leadership die at a time. This effect ends if the Apostle is incapacitated.

The Apostle of Fire can take 3 Legendary Actions, choosing from the options below. Only one Legendary Action option can be used at a time and only at the end of another creatures' turn. All spent Legendary Actions are regained at the start of her turn.

Insulting Rebuke. At the end of a turn of a nonhostile creature within 60 feet of the Apostle, the Apostle telepathically compels that creature to immediately make an extra attack against the target it attacked during this turn. After the attack, the creature gains disadvantage on its next saving throw, regardless of whether the attack hits or misses. This action can only be used on creatures whose attack missed in this round.

Mind Intrusion (costs 2 Actions). The Apostle invades the mind of a target within 60 feet. It must succeed on a DC 14 Wisdom saving throw or become restrained. At the beginning of its turn, it takes 14 (4d6) psychic damage and can then repeat the Wisdom saving throw to end the effect. Targets immune to being charmed cannot be targeted with this effect.

Mind Wave (costs 3 Actions). The Apostle sends a psychic wave all around her. All creatures within 60 feet of her must make a DC 14 Wisdom saving throw, taking 14 (4d6) psychic damage on a failed save or half as much on a successful one.