Swarm of Esteron

Esteron are small, winged salamanders that live in large groups. They cluster around subterranean bodies of water and aggressively protect such places. Some underground creatures see the esteron as a delicacy, but those who hunt esteron know the beasts are quick to form swarms that can easily overwhelm an unprepared hunter.

Esteron are highly sociable, communal creatures, and their communities are not lorded over by a dominant member. Instead, they cooperate with one another peacefully. When two groups of esteron encounter one another, they behave peacefully if the nearby water and food is abundant, sometimes even exchanging members. If resources are scarce, however, the group that inhabits the source of water drives away the outsider group with as little violence as possible.

Swarm of Esteron

Medium swarm of Tiny beasts, unaligned
Armor Class 13
Hit Points 54 (12d8)
Speed 10 ft., fly 30 ft., swim 30 ft.
10 (+0) 16 (+3) 10 (+0) 2 (-4) 12 (+1) 4 (-3)

Damage Resistances bludgeoning, piercing, slashing
Condition Immunities charmed, frightened, grappled, paralyzed, petrified, prone, restrained, stunned
Senses darkvision 60 ft., passive Perception 11
Challenge 2 (450 XP)

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.


Bites. 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.

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