Brutalizer Exarch

Regenerate. This creature heals 2d6 at the beginning of each of its turns.

Spellcasting. The Brutalizer Exarch is a 5th-level spellcaster. Its spellcasting ability is wisdom (spell save DC 15, +4 to hit with spell attacks). The Inquisitor Exarch has following cleric spells prepared:
Cantrips (at will): toll the dead, word of radiance
1st level (4 slots): false life, ray of sickness

2nd level (3 slots): blindness/deafness, ray of enfeeblement

3rd level (2 slots): animate dead, vampiric touch

Multiattack. Brutalizer Exarch makes two attacks with its quarterstaff. It then casts a spell.

Quarterstaff. Melee Weapon Attack: +7 to hit, reach 5 ft., # target. Hit:  12 (2d6 + 6) [bludgeoning damage. 

Infect. In response to an attack, Brutalizer Exarch can launch a dart coated with ichor at the attack in an attempt to infect them. The dart deals 1 piercing damage on a successful hit, and the target must succeed in a DC 10 CON saving throw or be infected with phyrexian ichor. An infected creature will gain 1 level of exhaustion after every long rest the creature undergoes. The creature may make a constitution saving throw at the beginning of every long rest with a DC of 15. A successful save results in the creature no longer being infected. A failed saved means the creature is still infected. Should a creature die from infection due to exhaustion or to any other cause, they will revive in an hour's time as a Contagious Nim.