Chrem (12)

Horrific Reproduction: Lays eggs in killed host's body. Eggs hatch and eat body's remains.

Body Thief: Claimed body looks and behaves like a zombie.

Spellcasting. Its spell casting ability is the Intelligence of its Soul Linked Ally.
Chrem has following Wizard spells prepared:
Unlimited Use while using a Host: Thorn Whip
1/day each: Grease

Latch On: 5ft range, +5 to hit, 1d4 + 2 piercing dmg
Target becomes restrained, blinded, DC 13 strength save. Start of restrained targets turn they take 1d4 +2 piercing damage.

Claim Host: When latched on, automatic hit for 1d4 +2 piercing damage.
-If creature hits 0 hit points, they become a zombie, controlled by Chrem.

Host Slam: Slam attacks while Chrem is controlling a host deal 1d6 + Dex modifier + Proficiency Bonus

Ghastly Glare: While Chrem has a host, can attempt to charm a creature within range
-Using spell save DC of Soul Linked Ally, Wisdom Save. On a fail, creature becomes dazed and move full speed in a random direction and will use their action on their turn to dash.
-Number of uses per long rest equal to proficiency bonus

Other Actions: Dash, Dodge, Disengage, Ready, Search, Use an Object

Opportunity Attack: Make a melee attack when an enemy leaves your melee range