Mithril dragon

The Mithril dragon is found in the Ancient Caverns, which may be accessed by starting the Pyre ship part of firemaking in Barbarian Training. They have extremely high defence, but since they are metal, they are weaker to magic attacks.

Its release shattered the King Black Dragon's long standing record as being the strongest dragon in RuneScape. Mithril dragons are currently the strongest dragon.

Its Melee attacks can hit 28s, and its Mage and Ranged attacks can hit 18s, and they are not firebreath attacks. Mithril dragons are also immune to poison. Many high-leveled players have stated that they can only kill four or five in one trip unless they are using a Unicorn stallion.

Players have found that by wearing Full Karil's armour with a rune crossbow and using Enchanted ruby bolts and enchanted diamond bolts, Mithril Dragons can be killed fairly easily and quickly.
 * The enchanted ruby bolts have a chance to reduce your health by 10%, and your opponents by 20% (both rounded down). Because Mithril Dragons have such high hitpoints, this can hit up to 50 damage.
 * After half health, the damage dealt is no longer as high. So switching to enchanted diamond bolts is effective because they have a chance to negate a large amount of your opponent's Ranged defence, making them much easier to hit.
 * They use their ranged attacks most frequently, so protect from missiles prayer works well.
 * If players have access to Armadyl armour, then this can be worn instead of Karil's armour, as Armadyl amrour gives much higher bonuses and doesn't degrade either.

Chewed Bones (See Other Drops) can be sacrificed on a Pyre Site around the lake while having in your possession a woodcutting axe, a tinderbox, a set of logs, and the apropriate Firemaking and Crafting levels for that type of log. Doing this results in an item appearing in your inventory, ranging from Barbarian Potions to a Dragon Full Helm. Some logs on the RuneScape Forums report having received Dragon Full Helms while making multiple pyres in a row, but it is not confirmed that this increases the odds of receiving a Dragon Full Helm.

Habitat(s)
The Ancient Cavern.

Weapons

 * Rune battleaxe
 * Rune spear
 * Rune mace
 * Rune 2h sword
 * Dragon spear

Armour

 * Dragon full helmet (extremely rare)
 * Rune medium helmet
 * Rune full helmet
 * Dragon medium helmet
 * Rune Sq Shield

Arrows and runes

 * Rune dart (p) (14)
 * Adamant dart (p) (20)
 * Rune knife (18)
 * Rune javelin (8)
 * Blood rune (27)
 * Soul rune (10)
 * Nature rune (67)
 * Rune arrow (8)
 * Rune bolts (10mill-27mill)

Other

 * Coins (600-3000)
 * Super attack potion
 * Super strength potion
 * Super defence potion
 * Super attack mix
 * Super strength mix
 * Super defence mix
 * Prayer mix
 * Prayer potion
 * Shark (1, 6)
 * Runite bar (1, 2)
 * Gems
 * Silver ore (100 noted)
 * Herbs
 * Uncut gem
 * Ancient page
 * Chewed bones
 * Clue Scroll (Level 3)
 * Loop half of a key
 * Dragon shield half
 * Draconic visage (very rare)
 * Gold charm (4)
 * Crimson charm (4)
 * Blue charm (4)
 * Green charm (4)

''Note: There has been no confirmed report of the Mithril Dragon dropping dragon platelegs or dragon plateskirts. It is widely believed they do not.''