Mithril dragon

Mithril dragons are found in the Ancient Cavern, which may be accessed by starting the Pyre ship section of Firemaking in Barbarian Training. The dragons have extremely high defence, but since they are made of metal, are weak to magic. Mithril dragons are often killed for their possible drops, which include the Dragon full helm, Draconic visage, Chewed bones and Elite clue scroll.

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

Habitat
Mithril dragons can only be found on the top level of the Ancient Cavern. (Please note that cannons are not allowed here.) There are three ways to reach them:
 * 1) Enter the cavern by jumping into the whirlpool near Otto Godblessed's cabin. Go down the stairs, run east past Brutal green dragons, and climb the stairs to the mithril dragons. Partial completion of Barbarian Training is required to use this entrance.
 * 2) Use Fairy ring BJQ to teleport inside the cavern. Run east past the Waterfiends and the brutal green dragons, and climb the stairs. Partial completion of Fairy Tale II - Cure a Queen and initial repairs of ring BJQ are required before the ring can be used.
 * 3) Use a Ferocious ring to teleport to Kuradal, run north, go down the stairs, run north-east past barbarian spirits and brutal green dragons, and climb the stairs. A ferocious ring can only be obtained in Kuradal's Dungeon and only when on a Slayer task assigned by Kuradal. As soon as you go in the cavern entrance, activate protect magic to prevent magic attacks by brutal green dragons. One is right near the stairs so stay away from the dragon. An ice arrow may be shot at the player from nearby waterfiends. The dragon's magic attack is like a water wave attack. Both can hit for significant damage, but protection prayers should be used to block the attack style you are weakest to.

To use the ancient cavern, one must have completed the first part of barbarian firemaking training, and then talked to Otto about pyre ships. After the conversation is over, the player can now go in the whirlpool. Note that upon entering, one must climb down stairs from the safespot reached. Activate Protect Magic/Deflect Magic prayer, then run south to a set of stairs leading to the mithril dragons. It is advised to not walk around the Cavern because it is littered with several brutal green dragons. If the player is unlucky he/she might get attacked by a waterfiend. It is advised to use protect/deflect mage because the path to the mithril dragons is within the range of 2 brutal green dragons.

The whirlpool entrance is closer to the stairs and only involves running past brutal green dragons. However, its drawback is that players cannot have a familiar summoned when jumping into the whirlpool, which wastes an inventory space for the pouch. It is also very far from a bank. Many players therefore prefer using the fairy ring or a ferocious ring. Using the fairy ring can be dangerous, since its location is right near waterfiends and you need to use prayer longer because of the brutal green dragons between the stairs and ring. The whirlpool method can take some time, due to that you run and jump into the whirlpool, and it is dark for about 5 seconds.

100% drop

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Armour

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Trivia

 * Mithril dragons are the only Slayer task that Duradel, Lapalok, and Kuradal do not give advice for; "You are a battlemaster; test your skills."
 * In order to receive a Dragonkin key, you must take the Strange key loop and Strange key teeth (both obtained from While Guthix Sleeps) to the mithril dragons, and use one of the halves on a dragon. It will animate as if it's breathing fire at you, but does not do any damage. Afterwards it's temporarily tolerant to you, giving you time to run away. During the fusing of the key, the Mithril dragon will temporarily appear as level 57.
 * Mithril dragons are one of only two types of dragons that cannot be poisoned, the other being the Brutal green dragon.
 * Despite their immunity to poison, mithril dragons can still be poisoned with Smoke spells from the Ancient Magicks spellbook. This may be a glitch.
 * In a Postbag from the hedge, Oziach pointed out that there are bronze dragons, iron dragons, steel dragons, and mithril dragons when he was chatting with Evil Dave. Oziach deduced that there will be adamant dragons, rune dragons, and even Dragon dragons.
 * When they cast their dragonfire, it looks like the close-ranged dragonfire attack from its lesser counterparts and chromatic dragons in melee range. This also seems to apply to Brutal green dragons, and has not been fixed.
 * It is believed that they are only assigned as Slayer tasks for players with a combat level of 120 or above. This has been proven untrue, as players can get a mithril dragon task even at only 100 combat, though it is much more common for players to receive this assignment with a combat level over 120.
 * When killed, it says on the Adventurer's Log: I killed [number] of mithril dragons. Another one (if you killed 1), is "I killed a mithril dragon."
 * Interestingly, their examine text indicates that metallic dragons, or at least mithril ones, may be the result of unnatural experimentation, of course, this may also refer to how they were created by the Dragonkin.
 * This is the only metal dragon not in Brimhaven Dungeon.
 * Mithril dragons are the strongest boss monster to reside in a single way combat area.
 * Casting the spell wind strike is known as the best method of attack against mithril dragons.
 * Contrary to popular belief, mithril dragons are in fact, not a dragon. They are a species of demon.

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