Gargantuan monstrosity, unaligned

Armor Class 16 (natural armor)
Hit Points 248 (16d20 + 80)
Speed 20 ft., fly 120 ft.

28 (+9) 10 (+0) 20 (+5) 10 (+0) 16 (+3) 9 (-1)

Saving Throws Dex +5, Con +10, Wis +8, Cha +4
Skills Perception +8
Damage Immunities lightning, thunder
Senses passive Perception 18
Challenge 13 (10,000 XP)


  • Innate Spellcasting. The thunderbird’s innate spellcasting ability is Wisdom (spell save DC 16). The ancient one can innately cast the following spells, requiring no components:
  • Keen Sight and Hearing. The thunderbird has advantage on Wisdom (Perception) checks that rely on sight.
  • Storm Healer. Whenever the thunderbird is subjected to lightning or thunder damage, it takes no damage and instead regains a number of hit points equal to the lightning or thunder damage dealt.
  • Storm Rider. The thunderbird is continuously surrounded by stormy weather, as if it had cast control weather, making all weather conditions within 5 miles one step more severe and all conditions within 500 feet two steps more severe. Its movement and senses are never impeded by wind, fog, rain, snow, or other weather effects. If the thunderbird is killed, these stormy weather conditions persist for 1d6 days centered on the site of its death.
  • Thunderflash. When the thunderbird is struck in melee with a metal weapon, the attacker takes 7 (2d6) lightning and 7 (2d6) thunder damage and must make two saving throws as the thunderbird’s thunderstrike ability, as if struck by three attacks in the same round.
  • Thunderstrike. If the thunderbird hits a creature two or more times in one round, that target must make a DC 19 Constitution saving throw, being stunned for 1 round on a failed save, or deafened for 1 round on a success. If the thunderbird hits with all three attacks in one round, the target must make a DC 18 Dexterity saving throw or be blinded for 1 round.


  • Multiattack. The thunderbird makes three attacks: one with its beak and two with its talons.
  • Beak. Melee Weapon Attack: +14 to hit, reach 15 ft., one target. Hit: 27 (4d8 + 9) piercing damage plus 7 (2d6) lightning and 7 (2d6) thunder damage.
  • Talons. Melee Weapon Attack: +14 to hit, reach 10 ft., one target. Hit: 23 (4d6 + 9) slashing damage plus 7 (2d6) lightning and 7 (2d6) thunder damage and the target is grappled (escape DC 19). Until this grapple ends, the target is restrained and takes an additional 7 (2d6) lightning and 7 (2d6) thunder damage each round at the start of its turn. The thunderbird can grapple one Large or smaller creature with each of its talons, and until a grapple ends it can’t use that talon on another target.


The thunderbird can take 3 legendary actions, choosing from the options below. Only one legendary action option can be used at a time and only at the end of another creature’s turn. The thunderbird regains spent legendary actions at the start of its turn.

  • Search. The thunderbird makes a Wisdom (Perception) check.
  • Swoop. The thunderbird flies up to its speed and makes one talons attack.
  • Thunderbolt (2 Actions). If the thunderbird has already cast call lightning, it calls down a lightning bolt with its action. One-half of the damage from this bolt is lightning damage and one-half is thunder damage.


Thunderbirds bring the storm on their wings. In times of drought, they are welcomed with joy and celebration. In other times, they are placated with gifts in hopes that they might leave quickly before flooding begins. When angered, thunderbirds can call down hurricanes and lay waste to entire villages, so in regions where these birds dwell, many villages maintain extensive rituals designed to appease and honor the local thunderbirds. Thunderbirds nest near the base of waterfalls, where the constant thrum of crashing water prepares the hatchlings for a life at the heart of a storm. Once the chicks have hatched, their parents carry the offspring to nests at the top of mountains, where the young are struck by their first bolts of lightning and learn the mysteries of the storm.

Section 15: Copyright Notice

Latin American Monsters (5E) © 2021, Legendary Games; Authors Miguel Colon, Ismael Alvarez, Robert J. Grady, Jason Nelson.

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