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Monsoon Sire

Huge dragon, neutral

AC
19
HP
175
Speed
40
CR
13

He arrives ahead of the rains every year, riding the grey front down out of the high country with thunder stacked behind him like luggage. The Monsoon Sire does not rule the river — he feeds it, and he expects gratitude in the form of everything left out unroofed. Villages lay their first seed-corn on flat stones when his shadow crosses the fields. It is cheaper than gutters.


Armor Class 19 (rain-dark scales)

Hit Points 175 (13d12 + 91)

Speed 40 ft., fly 80 ft., swim 40 ft.


STR
22 (+6)
DEX
16 (+3)
CON
24 (+7)
INT
16 (+3)
WIS
18 (+4)
CHA
20 (+5)

Saving Throws Cha +10, Str +11

Skills Perception +9, Intimidation +10

Damage Resistances cold, lightning

Damage Immunities poison

Condition Immunities poisoned

Senses blindsight 60 ft., darkvision 120 ft., passive Perception 19

Languages Common, Draconic, Primordial

Challenge 13


Traits

Legendary Resistance (2/Day). If the sire fails a saving throw, it can choose to succeed instead.

Amphibious. The sire can breathe air and water.

Actions

Multiattack. The sire makes three attacks: one with its bite and two with its claws.

Bite. Melee Attack Roll: +11, reach 15 ft. Hit: 22 (3d10 + 6) Piercing damage.

Claw. Melee Attack Roll: +11, reach 10 ft. Hit: 24 (4d8 + 6) Slashing damage.

Downpour Breath (Recharge 5–6). The sire exhales a drowning sheet of rain in a 60-foot cone. Each creature in the area must make a DC 18 Dexterity saving throw, taking 36 (8d8) Bludgeoning damage on a failure, or half as much on a success. Nonmagical flames are extinguished, and each creature that fails is soaked until the end of the sire's next turn: the next time it takes Cold damage within that time, it takes an extra 3 (1d6) Cold damage.

Legendary Actions

Sire's Swipe. The sire makes one Claw attack.

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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