Creature Reference Back to Creatures

Giant Flea Swarm

Medium · Beast · CR 2 · Unaligned

Source. Tome of Beasts 3

14 (natural armor)

58 (9d8+18)

Ability Scores

Core attributes and their modifiers.

STR

DEX

CON

INT

-4

WIS

CHA

-4

Overview

Category Monsters

Size Medium

Type Beast

Alignment Unaligned

XP 450

Initiative Bonus +2

Movement

Walk 30 ft (9.1 m)

Swim 15 ft (4.6 m)

Climb 20 ft (6.1 m)

Crawl 15 ft (4.6 m)

Senses

Blindsight 60 ft (18.3 m)

Passive Perception 10

Skills

Perception +0

Resistances & Immunities

Damage Resistances

bludgeoning, piercing, slashing

Condition Immunities

charmed, frightened, grappled, paralyzed, petrified, prone, restrained, stunned

Traits

Blood Sense

The giant flea can pinpoint by scent the location of creatures that have blood within 60' of it.

Keen Smell

Advantage: smell Wis (Percept) checks.

Ravenous

When a creature that doesn’t have all of its hp starts its turn in the swarm’s space that creature must make DC 12 Dex save or lose 5 (2d4) hp from blood loss.

Standing Leap

The swarm’s long jump is up to 30' and its high jump is up to 15 feet with or with o a running start.

Swarm

The swarm can occupy another creature’s space and vice versa and the swarm can move through any opening large enough for a Tiny flea. The swarm can’t regain hp or gain temp hp.

About Giant Flea Swarm

Giant Flea Swarm is a medium beast with a Challenge Rating of 2. It has a unaligned alignment.

In combat, this creature maintains an Armor Class of 14 and possesses 58 hit points (derived from 9d8+18).

GM Tips: Using Giant Flea Swarm

1 tips available

When using Giant Flea Swarm in your D&D 5e campaign, consider these tactical approaches:

Climbing Advantage: This creature can climb at 20 ft. It can use walls and ceilings for tactical positioning. Consider using 'Spider Climb' negation or fighting in open areas without vertical surfaces.

Player Guide: Facing Giant Flea Swarm

1 strategies available

When your party encounters this creature, keep these strategies in mind:

Climbing Defense: This creature can climb at 20 ft! It can use walls and ceilings for surprise attacks. Fight in open areas without vertical surfaces. 'Spider Climb' negation spells can help.

Encounter Building Calculator

Standard Party Encounter (4-5 characters):

This creature is a medium encounter for a party of 4 characters of level 2.

Solo Encounter:

A single character of level 4 (up to level 20) can face this creature in a medium to hard encounter.

Experience Point Thresholds:

Medium: 600 XP
Hard: 900 XP
Deadly: 1,200 XP

Based on D&D 5e Dungeon Master's Guide encounter building guidelines. CR roughly equals party level for medium encounters.

Frequently Asked Questions

What is the challenge rating of Giant Flea Swarm?: Giant Flea Swarm has a Challenge Rating of 2, making it appropriate for parties of level 2.0.
What type of creature is Giant Flea Swarm?: Giant Flea Swarm is a Medium Beast, which affects how certain spells and abilities interact with it.