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Reservoir Mother

Huge beast, unaligned

AC
13
HP
114
Speed
10
CR
3

Reservoir keepers swear the deep water breathes, slow and wide, above the drowned sluice gates. The mother is the reason nets come up empty and boat chains come up tight: a whiskered shadow the size of a skiff, herding her fry through black water.


Armor Class 13 (natural armor)

Hit Points 114 (12d12 + 36)

Speed 10 ft., swim 40 ft.


STR
15 (+2)
DEX
10 (+0)
CON
16 (+3)
INT
2 (-4)
WIS
12 (+1)
CHA
6 (-2)

Saving Throws Con +5

Skills Athletics +4, Perception +3

Senses blindsight 30 ft., passive Perception 13

Languages —

Challenge 3


Traits

Swallow. When the mother hits a Large or smaller creature with its bite, that creature is swallowed (escape DC 13). A swallowed creature is blinded and restrained, and takes 7 (2d6) Acid damage at the start of each of the mother's turns.

Actions

Multiattack. The mother makes one bite attack and one tail attack.

Bite. Melee Attack Roll: +4, reach 10 ft. Hit: 15 (3d8 + 2) Piercing damage.

Tail. Melee Attack Roll: +4, reach 10 ft. Hit: 9 (2d6 + 2) Bludgeoning damage, and the target must succeed on a DC 13 Constitution saving throw or be pushed 10 feet away.

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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