Chaos Herald Pyl (Demolith)

Demolith Subtype. Pyl has the "(demolith)" tag, which has no rules of its own, but is a tag that affects him in the same way that it would affect a demon or devil.

Semi-Immortal Nature. Pyl can't die of old age unless affected by magic of a spell of 6th level or higher and doesn't require food, drink, air, or sleep.

Magic Weapons. Pyl's weapon attacks are magical.

Blessing of the Wrathborne. As long as Pyl has an ally that is a Fiend, he has a +2 bonus to hit and to damage for all of his attacks, but has disadvantage on saving throws.

Multiattack. Pyl makes a melee attack and casts a 1st level or Cantrip spell, not expending a spell slot in the process.

Hellish Quarterstaff. Melee Weapon Attack: +7 to hit, reach 5 ft., one target. Hit: 5 (1d6 + 2) bludgeoning damage, or 6 (1d8 + 2) bludgeoning damage if used with two hands to make a melee attack, plus 7 (2d6) fire, force, or necrotic damage (Pyl's choice).

Summon Demoliths (Recharge 6). Pyl summons 1d8 demoliths of CR 7 or lower at points he can see within 120 feet of him that remain for 1 hour or until slain. The summoned demoliths cannot summon any other creatures, are under Pyl's command, obey his orders (no action required by Pyl), and take their turns immediately after him.

Spellcasting. Pyl casts one of the following spells, using Intelligence as his spellcasting ability (spell save DC 17, +9 to hit with spell attacks). Pyl has the following wizard and sorcerer spells prepared:

Cantrips (at will): fire bolt (2d10), prestidigitation, shocking grasp

1st level (4 slots): detect magic, identify, mage armor, thunderwave, chaos bolt

2nd level (3 slots): blindness/deafness, continual flame, misty step

3rd level (3 slots): fireball, call lightning, fly

4th level (3 slots): chaotic form, confusion

5th level (2 slots): contact other plane

6th level (1 slot): aura of wrath