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Swarm of Leech Creepers

Challenge
str
4
dex
16
con
10
int
2
wis
8
cha
4

AC 13 (10 while attached)
HP 10 (5d4; bloodied 5)
Speed 5 ft., climb 5 ft.
Initiative Dex +3 (13), Insight -1 (9), Perception -1 (9)


Proficiency +2; Maneuver DC 13
Saving Throws Str -3, Dex +3, Con +0, Int -4, Wis -1, Cha -3
Senses tremorsense 60 ft., passive Perception 9
Languages

Amphibious. The leech creeper can breathe both air and water

Fire Fear. When the leech creeper comes within 3 feet of an open flame, it detaches if attached to a host.

Swarm. The swarm is composed of 5 or more creatures. If it is subjected to a psionic power, attack, or other effect that affects only one target, it takes any damage but ignores other effects. It can share its space with Medium or smaller creatures or objects. The swarm can move through any opening large enough for one tiny creature without squeezing.

Area Vulnerability. The swarm takes double damage from any effect that targets an area.

Swarm Dispersal. When the swarm is reduced to 0 hit points, it turns into 2 (1d4) leech creepers, each of which are bloodied.


ACTIONS

Latch On. Melee Weapon Attack: +5 to hit, reach 5 ft., one creature. Hit: 5 piercing damage, or 2 piercing damage if the swarm is bloodied, and the swarm attaches to the target. A creature can use an action to detach it, and it can detach itself as a bonus action.

Blood Drain. The swarm drains blood from the creature it is attached to. The creature loses 20 (5d8) hit points. After the swarm has drained 36 hit points, it detaches itself and can’t use Blood Drain again until it finishes a rest.

Legends and Lore

With a Medicine or Nature check, characters can learn the following:

DC 10 A leech creeper attaches itself to its victim and then drains their blood.

DC 15 Leech creepers are often found in pools of stagnant water.

DC 20 Some giant leech creepers have been known to kill a human single-handed.

Description

Leech creepers are foot-long leeches which feed on mammals. Stealthy, they lie in wait for days at a time, and attack by surprise. Once a leech creeper attaches itself to its victim, it sucks its blood until the remaining corpse is dry.

Behavior

1-3 Hiding in wait for a new victim

4 Greedily draining a recently killed victim of blood

Signs

1-2 A stagnant pool of water

3-4 An exsanguinated corpse

Encounters

Leech creepers are usually found in moist natural areas, such as jungles or near bodies of still water.

CR 0–1 3 or 4 leech creepers

Treasure  corpse with 80 credits and a ruby ring worth 25 credits

CR 1–2 Swarm of leech creepers

Treasure  two corpses with 200 credits, a personal communicator, and one dose of medical gel

CR 3  Giant leech creeper

Treasure  the desiccated remains of a corpse inside a suit of carbide plate

Monster Type Description

Beasts are natural animals whose existence and abilities are nonmagical. A bear and a tyrannosaurus rex are both beasts.