Donn Cuailnge

Family: Titan

Gargantuan monstrosity (titan), neutral

Armor Class 20 (natural armor)
Hit Points 310 (20d20 + 100)
Speed 50 ft.

30 (+10) 10 (+0) 20 (+5) 2 (-4) 12 (+1) 7 (-2)

Skills Perception +8
Senses passive Perception 18
Languages understands Common but can’t speak
Proficiency Bonus +7
Challenge 23 (50,000 XP)


  • Immutable Form. The donn cuailnge is immune to any spell or effect that would alter its form.
  • Legendary Resistance (3/Day). If the donn cuailnge fails a saving throw, it can choose to succeed instead.
  • Magic Resistance. The donn cuailnge has advantage on saving throws against spells and other magical effects.
  • Magic Weapons. The donn cuailnge’s weapon attacks are magical.
  • Siege Monster. The donn cuailnge deals double damage to objects and structures.


  • Multiattack. The donn cuailnge makes one Gore attack and one Stomp attack.
  • Gore. Melee Weapon Attack: +17 to hit, reach 20 ft., one target. Hit: 32 (4d10 + 10) piercing damage. If the donn cuailnge moved at least 20 feet in a straight line toward the target immediately before the hit, the target takes an extra 11 (2d10) piercing damage; if the target is a creature, it also must succeed on a DC 25 Strength saving throw or be pushed up to 20 feet from the donn cuailnge and have the prone condition.
  • Stomp. Melee Weapon Attack: +17 to hit, reach 5 ft., one target. Hit: 32 (4d10 + 10) bludgeoning damage.


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

  • Attack. The donn cuailnge makes one Gore attack or Stomp attack.
  • Move. The donn cuailnge moves up to half its speed.
  • Impale (Costs 2 Actions). Melee Weapon Attack: +17 to hit, reach 20 ft., one prone target. Hit: 37 (6d8 + 10) piercing damage and the target is restrained by being impaled on one of the donn cuailnge’s horns. A creature can use an action to remove itself (or a creature it can reach) from the horn, ending the restrained condition.


The donn cuailnge is an enormous bull, towering over any other creature on the battlefield. Its hide is a deep brown color, which gives it its name. Its sheer size is breathtaking, and its strength and power are unparalleled.

The donn cuailnge (don-COOL-neh), also known as the Brown Bull, is a legendary bull. This immense beast is known for its massive size, casting a shadow that can cover entire landscapes.

The donn cuailnge is not inherently aggressive, but its colossal size and power made it a sought-after prize, sparking battles and wars to claim possession of the bull.

The legends of its colossal size, battles, and connection to mythology make it a prized target for those seeking glory, wealth, or power. Adventurers might be tasked with protecting the bull, recovering it from thieves, or navigating the conflicts that revolve around it. Its immense strength and charging ability would make it a formidable adversary, creating memorable and potentially epic battles when encountering the donn cuailnge.

Section 15: Copyright Notice

5E RPG: Celtic Bestiary. Copyright 2023, Mal and Tal Enterprises, LLC; Author Michael Tresca.

This is not the complete section 15 entry - see the full license for this page