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Constantine III of Britain, “The Last Defender”

Constantine III of Britain
  • Alias: The Last Defender
  • Gender: Male
  • Race: Human
  • Occupation: King of the Britons
  • Religion: Druidic beliefs
  • Allies: Knights of the Round Table, loyal Briton warriors
  • Enemies: Saxon invaders, sons of Mordred
  • Abode/Base of operations: Camelot, the capital of Britain
  • Nationality: Briton
  • Languages: Common, Celtic
  • Alignment: Lawful Good
  • Affiliation(s): Arthurian Knights, Council of Britons
  • Significant others: Queen Guinevere (wife)

Constantine III of Britain is a renowned figure in the realm of Arthurian legends, known as King Arthur’s cousin and successor as the ruler of the Britons. He hails from the noble lineage of Cornwall, being the son of Cador, a relative of Arthur himself.

Following the tragic Battle of Camlann, where Arthur met his fate, the burden of leadership fell upon Constantine’s shoulders. Accepting the weight of the crown, he stepped forward as the rightful heir, determined to carry on Arthur’s legacy and protect the Britons from external threats.

Constantine III faced numerous challenges during his reign, particularly from the relentless Saxon invaders who sought to claim the lands of Britain for their own. Additionally, the two sons of Mordred, Arthur’s treacherous nephew, posed a constant threat, fueled by their ambition and desire for power.

Driven by a sense of duty and a deep-rooted loyalty to his people, Constantine III waged war against the Saxons and the sons of Mordred. He understood that peace could only be achieved by subduing his enemies and establishing stability within the realm. However, the path to peace was fraught with obstacles, and Constantine had to make difficult decisions to safeguard his kingdom.

In a tragic turn of events, Constantine found himself at a crossroads. Seeking sanctuary within a church, he disguised himself as an abbot, trying to find solace and guidance. However, consumed by vengeance and the weight of his responsibilities, he committed a grievous act. Disregarding the sanctity of the church, he violated the sacred space and ended the lives of Mordred’s sons on the very steps of the altar.

This act of violence within the sanctuary unleashed the wrath of the gods upon Constantine III. Struck down for his transgressions, he met his untimely demise, leaving a legacy marred by tragedy and regret. His physical appearance was that of a noble and regal figure, with a commanding presence and a determined gaze that reflected his unwavering resolve.

Constantine III of Britain is a tall and regal figure with a commanding presence. He has a strong build, with broad shoulders and a chiseled jawline. His hair is a rich chestnut brown, worn in a dignified manner, and his eyes are deep and piercing, reflecting both wisdom and determination. Constantine carries himself with an air of nobility, often donning elaborate armor adorned with the emblem of the British crown.

Constantine III of Britain will forever be remembered as a complex character, torn between the pursuit of peace and the burdens of rulership. Though his journey ended in darkness, his story serves as a cautionary tale of the consequences that befall those who stray from the path of righteousness in their quest for power and justice.

Constantine III of Britain

Constantine III of Britain

Medium humanoid (human), lawful good

Armor Class 20 (plate armor, shield) Hit Points 180 (20d8 + 100) Speed 30 ft.

18 (+4)14 (+2)20 (+5)16 (+3)18 (+4)20 (+5)

Saving Throws Str +8, Con +11, Wis +8, Cha +11 Skills History +9, Insight +8, Persuasion +11, Religion +9 Senses passive Perception 14 Languages Common, Latin Challenge 15 (13,000 XP)

Legendary Resistance (3/Day). If Constantine III fails a saving throw, he can choose to succeed instead.


Excalibur. Melee Weapon Attack: +8 to hit, reach 5 ft., one target. Hit: 15 (2d6 + 8) slashing damage plus 7 (2d6) radiant damage.

Holy Smite (Recharge 5-6). Constantine infuses his weapon with divine energy. On his next successful melee weapon attack, the target takes an additional 14 (4d6) radiant damage and must succeed on a DC 18 Wisdom saving throw or be blinded until the end of their next turn.

Commander’s Strike. Constantine chooses one ally he can see within 30 feet of him. That ally can use their reaction to make a weapon attack, adding 4 to the attack roll.

Divine Shield (Recharge 6). Constantine calls upon divine energy to protect himself. Until the start of his next turn, he has advantage on saving throws and resistance to all damage.

Lair Actions

On initiative count 20 (losing initiative ties), Constantine can take a lair action to cause one of the following effects:

  • Inspiring Aura. Constantine inspires his allies within 30 feet. They gain advantage on saving throws against being frightened and resistance to radiant damage for 1 minute.
  • Divine Intervention. Constantine calls upon divine intervention, summoning a celestial being to aid him. A deva appears within 60 feet of Constantine and acts immediately, following Constantine’s command.
  • Holy Ground. The area within 30 feet of Constantine becomes sanctified ground. Creatures of evil alignment suffer disadvantage on attack rolls and saving throws while within the area.


  • Excalibur (longsword): A legendary sword said to be pulled from a stone, granting it immense power and the ability to smite evil.
  • Plate armor: Shining armor adorned with the symbol of the Knights of the Round Table.
  • Shield of Britannia: A sturdy shield bearing the crest of King Arthur, providing extra protection in battle.
  • Medallion of Kings: A magical amulet passed down through the royal bloodline, granting Constantine enhanced leadership and charisma.


Constantine III of Britain stands tall and regal, his presence commanding respect and admiration. He has short, graying hair and a neatly trimmed beard, with wise eyes that seem to hold the weight of centuries. His armor gleams in the light, bearing the symbol of a white dragon on his chest, representing his lineage and connection to King Arthur.

Driven by a deep sense of duty and honor, Constantine fights to protect his people and uphold the legacy of King Arthur. He wields Excalibur with grace and skill, channeling its divine power to smite his enemies. He inspires those around him with his unwavering leadership, instilling courage and determination in his allies.

Constantine’s ultimate goal is to unite the lands of Britannia, drive away the Saxon invaders, and establish a lasting era of peace and prosperity. He seeks to restore the glory of Camelot and fulfill the prophecy of the return of King Arthur. With his unwavering faith and strategic mind, Constantine III stands as the embodiment of hope and the beacon of light in a troubled world.

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