Sources
CR
Type
Size
Alignment
Movement

Puppeteer Parasite

Tiny Aberration, Neutral Evil

Armor Class 15 (natural armor)
Hit Points 71 (11d4 + 44)
Speed 10 ft., fly 30 ft. (hover)
STR
2
-4
DEX
15
+2
CON
18
+4
INT
16
+3
WIS
10
+0
CHA
3
-4
Saving Throws DEX +4, CON +6, WIS +2
Skills Stealth +4
Damage Vulnerabilities radiant
Damage Resistances fire, necrotic, poison
Condition Immunities Charmed, Frightened, Poisoned
Senses blindsight 60 ft. (blind beyond this radius), passive Perception 10
Languages telepathy 30 ft.
Challenge 3 (700 XP)

Traits

Unusual Nature. The parasite doesn't require air or sleep.

Actions

Cling. Melee Weapon Attack: +4 to hit, reach 5 ft., one creature. Hit:12 (3d6 + 2) necrotic damage, and the parasite attaches to the target. While attached, the parasite can't make Cling attacks. The parasite can detach itself by spending 5 feet of its movement. As an action, a creature within reach of the parasite can try to detach it, doing so with a successful DC 14 Strength check.

Consume Life. The parasite deals 12 (3d6 + 2) necrotic damage to one creature it is physically attached to, provided that creature isn't a Construct or an Undead. The parasite regains hit points equal to the damage taken.

Bonus Actions

Suggestion (Psionics; 1/Day). The parasite casts the suggestion spell, requiring no spell components and using Intelligence as the spellcasting ability (spell save DC 13).

Lore

A puppeteer parasite looks like a rubbery amoeba the size of a dinner plate. Its dorsal surface is soft and glossy, while its ventral surface is lined with bony hooks. The parasite uses its hooks to attach to a wall or ceiling until suitable prey passes nearby.