Creature Reference Back to Creatures

Swarm of Esteron

Medium · Beast · CR 2 · Unaligned

Source. Tome of Beasts 2

54 (12d8)

Ability Scores

Core attributes and their modifiers.

STR

DEX

CON

INT

-4

WIS

CHA

-3

Overview

Category Monsters

Size Medium

Type Beast

Alignment Unaligned

XP 450

Initiative Bonus +3

Movement

Walk 10 ft (3 m)

Fly 30 ft (9.1 m)

Swim 30 ft (9.1 m)

Climb 5 ft (1.5 m)

Crawl 5 ft (1.5 m)

Senses

Darkvision 60 ft (18.3 m)

Passive Perception 11

Resistances & Immunities

Damage Resistances

bludgeoning, piercing, slashing

Condition Immunities

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

Traits

Amphibious

The swarm can breathe air and water.

Keen Smell

The swarm has advantage on Wisdom (Perception) checks that rely on smell.

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 esteron. The swarm can’t regain hit points or gain temporary hit points.

Actions

Bites

+5 to hit. Hit: 4d6 piercing damage.

Melee Weapon Attack: +5 to hit, reach 0 ft., one creature in the swarm's space. Hit: 14 (4d6) piercing damage, or 7 (2d6) piercing damage if the swarm has half its hp or fewer.

About Swarm of Esteron

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

In combat, this creature maintains an Armor Class of 13 and possesses 54 hit points (derived from 12d8).

GM Tips: Using Swarm of Esteron

2 tips available

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

Flight Control Strategy: Target flying creatures with spells like 'Hold Person', 'Web', or 'Grease' to ground them. Without flight restriction, they can escape melee range easily. Consider area denial spells below their flight altitude to force them into disadvantageous positions.
Aquatic Combat: This creature can swim at 30 ft. It has advantage in water environments. Consider fighting on land or using water-based spells against it.

Player Guide: Facing Swarm of Esteron

2 strategies available

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

Counter Flight Advantage: This creature can fly! Use ranged attacks, reach weapons, or spells like 'Thunderwave' to push it away. Consider 'Gust of Wind' or 'Earthbind' to ground it. Melee characters need fly speed or flight magic to engage.
Aquatic Combat Defense: This creature can swim at 30 ft! It has advantage in water. Fight on land if possible. Use 'Control Water' or drain water sources to limit its mobility.

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