|Release date||3 July 2007 (Update)|
|Always drops||Dragon bones and 3 Mithril bars|
|Experimenting with mithril gone bad!|
Mithril dragons can be found and fought in the Ancient Cavern. To access the Ancient Cavern, the player needs to start the pyre ship section of Firemaking in Barbarian Training. Be wary as these monsters are extremely powerful. Their release broke the King Black Dragon's long-standing record as being the strongest dragon in RuneScape. It is strongly recommended to use antifire potions in conjunction with an anti-dragon shield (or a Dragonfire shield) when fighting these along with the appropriate protection prayer.
The ability to be assigned mithril dragons can be purchased for 80 Slayer reward points. Once unlocked, they can be disabled, but players must spend another 80 points to unlock them again. Players also must have entered the Ancient Cavern at least once to get mithril dragons as a slayer task. 
Slayer Masters offer to convince mithril dragons to drop their bars in noted form while on a slayer assignment, for a cost of 200 slayer points.
Mithril dragons can be found on the top level of the Ancient Cavern. Note that dwarf multicannons are not allowed in the Ancient Cavern.
To access 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. Upon entering, one must climb down stairs and then run south to a set of stairs leading up to the mithril dragons.
- ↑ https://twitter.com/jagexash/status/713721069136449537
- ↑ Dropped in bank notes if players have purchased the Duly noted unlock for 200 slayer reward points and are on an active slayer task of mithril dragons
Item Quantity Rarity GE market price Rune battleaxe 1 Common 24,567 Rune dart(p) 14 Common 15,400 Rune mace 1 Common 8,389 Rune full helm 1 Uncommon 20,731 Rune knife 8–18 Uncommon 3,776–8,496 Rune spear 1 Uncommon 12,042 Dragon full helm 1 Very rare (1/32,768) 34,914,443
Item Quantity Rarity GE market price Blood rune 27 Common 8,802 Rune javelin 8 Common 1,144 Dragon javelin heads 15 Uncommon  17,505 Rune arrow 8 Uncommon 752 Runite bolts 10–21 Uncommon 3,960–8,316 Soul rune 10 Uncommon 1,470
Item Quantity Rarity GE market price Prayer mix(2) 1 Uncommon 5,306 Superattack mix(2) 1 Uncommon 847 Super def. mix(2) 1 Uncommon 836 Super str. mix(2) 1 Uncommon 1,411
Item Quantity Rarity GE market price Coins 600–876 Common Not sold Runite limbs 1 Common 9,251 Runite bar 2 Common 24,836 Shark 1; 6 Common 907–5,442 Chewed bones 1 Uncommon (1/42) Not sold Ancient page 1 Uncommon (1/64) Not sold Clue scroll (elite) 1 Rare (1/350) Not sold Draconic visage 1 Very rare (1/10,000) 6,976,834
Rare drop tableIn addition to the drops above, this monster has access to the standard rare drop table.
Show/hide rare drop table Item Quantity Rarity GE market price Coins 3,000 Rare Not sold Loop half of key 1 Rare 9,297 Tooth half of key 1 Rare 13,732 Uncut sapphire 1 Rare 1,005 Runite bar 1 Rare 12,418 Unknown talisman
1 Very rare Error Nature rune 67 Very rare 16,348 Rune 2h sword 1 Very rare 37,936 Rune battleaxe 1 Very rare 24,567 Uncut emerald 1 Very rare 981 Law rune 45 Very rare 12,555 Death rune 45 Very rare 11,790 Steel arrow 150 Very rare 5,400 Rune arrow 42 Very rare 3,948 Adamant javelin 20 Very rare 1,280 Rune sq shield 1 Very rare 22,605 Dragonstone 1 Very rare 11,831 Silver ore 100 (noted) Very rare 8,000 Uncut ruby 1 Very rare 1,889 Rune kiteshield 1 Very rare 32,210 Dragon med helm 1 Very rare 59,270 Rune spear 1 Very rare 12,042 Shield left half 1 Very rare 65,436 Dragon spear 1 Very rare 37,207 Uncut diamond 1 Very rare 3,678 Rune javelin 5 Very rare 715
- Prior to the release of Dragon Slayer II, mithril dragons were brighter in colour. Their old appearance was given to rune dragons to make them appear more like the metals' true colours.
Dragons and dragon-like races
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