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, and elite clue scroll.

Mithril dragons are currently the strongest dragons. 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. There are two ways to reach them. One is by entering the cavern by jumping into the whirlpool near Otto Godblessed's cabin. The other is by using the fairy ring system (code BJQ) to teleport inside the cavern. The stairs at the west side of the cavern lead to the dragons.

The whirlpool entrance is closer to the stairs and only involves running past brutal green dragons. However, the drawback of using this entrance 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 prefer the fairy ring entrance because it is close to a bank, easy to access, and allows players to have a familiar summoned while using it. Although players must run past both waterfiends and brutal green dragons, the pros far outweigh the cons.

100% drop

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Weapons

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Armour

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Arrows/Runes/Talismans

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Gems/Ores/Bars

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Potions

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Other

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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.
 * In the 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 and rune dragons. But that's not the end, Evil Dave saw where Oziach was going. 'Eventually, somewhere in RuneScape there must be dragon dragon,' Oziach said. Fortunately, there are no Barrows dragons or Third-age dragons (although there are theories of the fabled White dragon).
 * Mithril dragons have been graphically updated with the release of the quest Love Story on 5 July 2010.
 * In THEORY, it is possible to have a Draconic visage, Clue scroll, Chewed bones, Ancient page and a Dragon full helmet on the same drop (as they are all extra drops).
 * Mithril dragons are the only metal dragon without an examine text consisting of "Its scales seem to be made of (metal type).