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Reliquary Swarm

Large undead (swarm), chaotic evil

AC
15
HP
97
Speed
20
CR
6

Every lantern tower had a reliquary — finger-bones, medals, the small hard things a keeper was buried with. When the ninth tower flooded, its reliquary came apart and did not settle. The swarm keeps roughly the shape of a kneeling person and comes apart the moment anyone tries to hold it to that.


Armor Class 15 (natural armor)

Hit Points 97 (13d10 + 26)

Speed 20 ft., fly 30 ft.


STR
16 (+3)
DEX
15 (+2)
CON
15 (+2)
INT
4 (-3)
WIS
11 (+0)
CHA
5 (-3)

Skills Stealth +5

Damage Resistances bludgeoning, piercing, slashing

Damage Immunities poison

Condition Immunities charmed, exhaustion, frightened, grappled, paralyzed, petrified, poisoned, prone, restrained, stunned

Senses blindsight 60 ft., passive Perception 10

Languages —

Challenge 6


Traits

Swarm. The swarm can occupy another creature's space and vice versa, and can move through any opening large enough for a coin. It cannot regain hit points or gain temporary hit points.

Kneeling Shape. While the swarm has more than half its hit points remaining it holds a human outline, and a creature that has not seen it move can mistake it for a statue.

Actions

Relics. Melee Attack Roll: +6, reach 0 ft., one creature in the swarm's space. Hit: 21 (4d8 + 3) Slashing damage, or 12 (2d8 + 3) Slashing damage if the swarm has half its hit points or fewer.

Scatter and Settle (Recharge 5–6). The swarm bursts outward. Each creature within 10 feet must make a DC 14 Strength saving throw, taking 18 (4d8) Bludgeoning damage and being knocked prone on a failure, or half as much damage and not knocked prone on a success. The swarm then moves up to 30 feet without provoking opportunity attacks.

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Further reading

Jetpack7 Game Master Series
The Game Master's Book of Random Encounters
Jeff Ashworth · 2020
The Game Master's Book of Traps, Puzzles and Dungeons
Jeff Ashworth · 2022
The Game Master's Book of Legendary Dragons
Aaron Hübrich · 2022