Ur-Dragon

Legend tells of an immensely powerful undead dragon that appears in the Everfall beneath Gran Soren.

In New Game+ the Ur-Dragon can easily be accessed via a purple riftstone on the beach within Cassardis.

Overview
The Ur-Dragon encounter in Dragon's Dogma takes the form of an asynchronous, ongoing online encounter, where players and their parties from around the world compete online to take down the Ur-Dragon. The effect and damage done by of each of these parties is combined until the creature is defeated. This will take multiple encounters, but all players who inflict damage on the Ur-Dragon can receive great spoils. The Arisen that inflicts the final blow will receive the greatest reward of all, and all slayers of the Ur-Dragon have their names and play times recorded in the hall of fame. Offline players will still be able to take on the Ur-Dragon alone, but receive different rewards. The Ur-Dragon is essentially an optional end-game boss, located Beyond the Rift.

Multiple Arisen can inflict the "final blow" to the same online dragon.

Defeating the Ur-Dragon unlocks "The Messiah" trophy.

Item Drops

 * Abyssinal Armor set (Coat, bracers, boots)
 * Angel's Fist
 * Ascalon
 * Dragon ClawDogma_UR_Loot.jpg
 * Dragon Horn
 * Dragon Scale
 * Dwells-in-light
 * Great Dragon Alula
 * Great Dragon Claw
 * Heaven's Key
 * Lambent Shield
 * Lustrous Greatshield
 * Putrid Dragon Scale
 * Siegfried's Mask
 * St. George's Mask
 * Beowulf Mask
 * Talarian White
 * Totem Mace
 * Volant White
 * 20xWakestone

Tactics

 * Blows to darkened areas are useless. (One of the first things my pawn stated after the fight began.) So attacking the brightly coloured spots (the hearts of the past Arisen) would be your best bet.
 * Attacking the jointed structures (knees, elbows, etc.) will attack multiple spots of the Ur-Dragon at the same time, exploit this to do much more damage in a much narrower timeframe.
 * Destroy the tail and wings earlier on for an easier time later, when it becomes frenzied. Avoid the frontal right arm while frenzied as you can still be hit while grappling it.

Trivia

 * This is, by far, the single strongest creature in the game.
 * As the Ur-Dragon takes damage to each location on it's body, those locations begin to look tattered and eventually rotted out. Additionally, the Ur-Dragon can be disemboweled.