An elf who learned to wield a sword, he baffles enemies with lightning-swift attacks.

The Celtic Guardian is an elite warrior who serves the Seelie Court. This brave warrior forms the spine of the army and is used to dealing with the dark forces of the Unseelie Court. He has taken an Oath to the Ancients of the High Fey. 

The Oath of the Ancients is as old as the race of elves and the rituals of the druids. Sometimes called fey knights, green knights, or horned knights, paladins who swear this oath cast their lot with the side of the light in the cosmic struggle against darkness because they love the beautiful and life-giving things of the world, not necessarily because they believe in principles of honor, courage, and justice. They adorn their armor and clothing with images of growing things-leaves, antlers, or flowers-to reflect their commitment to preserving life and light in the world.

The tenets of the Oath of the Ancients have been preserved for uncounted centuries. This oath emphasizes the principles of good above any concerns of law or chaos. Its four central principles are simple.

Kindle the Light. Through your acts of mercy, kindness, and forgiveness, kindle the light of hope in the world, beating back despair.

Shelter the Light. Where there is good, beauty, love, and laughter in the world, stand against the wickedness that would swallow it. Where life flourishes, stand against the forces that would render it barren.

Preserve Your Own Light. Delight in song and laughter, in beauty and art. If you allow the light to die in your own heart, you can't preserve it in the world.

Be the Light. Be a glorious beacon for all who live in despair. Let the light of your joy and courage shine forth in all your deeds.

He later became a knight of another dimension, often summoned via a card or spell. Celtic Guardians are actually a name given to any elves who are warriors who pledge service to another fey or elven ruler, religious orders, and noble causes. A knight's alignment determines the extent to which a pledge is honored. 

This creature was created by the magi of wonder and whimsy; Cameron the Clairvoyant. He loved to create, and was inspired by many things around him - Yugioh, people, places, things, concepts, nature, anime, pop culture - and loved to craft superior unique things for the Dungeons and Dragons community. Check out his homebrew creations in every category on D&DBeyond, and feel free to incorporate them into your homebrew campaigns. Cameron the Clairvoyant is a former player-character that reached level 20 and now functions as a NPC Archwizard, and has created numerous impactful magic items, weapons, subclasses, monsters, creatures, feats and spells. Seek him out in your next quest! He loves to take requests and interact with parties of player-adventurers.