There are only three dragons in Xenoblade Chronicles. They are as follows: The first, Dragon King Alcar, is a boss encountered in Prison Island, triggered by the Dragon Summon. It is level 79. The second one, Demon King Dragonia, is a quest exclusive enemy; level 99. It is found during a Colony 6 quest, Defend Colony 6 - Demon which is triggered by having 90% of Colony 6 restored. If Dragonia is defeated, it cannot be fought again until the next playthrough. It is the only enemy to possess a slotted Ledios Arms, which is the best Heavy Armour arm in the game. The only way to get multiple Ledios Arms is to steal and refrain from killing it.