Imcando dwarf
The Imcando dwarves are an ancient clan of dwarves, related to the ordinary Dwarves. The Imcando are skilled smithers, having created the original sword of Sir Vyvin's family in the Knight's Sword. The Imcando are believed to have inhabited Ice Mountain, however after the destruction of the Barbarian invasions they are believed to have scattered throughout Asgarnia. Currently the only two known living Imcando dwarves are Thurgo and Ramarno, who, like the rest of the Imcando dwarves, love redberry pie. Thurgo can be found south of Port Sarim and north of Mudskipper Point, he is also involved in the Knight's Sword quest and the Giant Dwarf quest. Ramarno can be found in The Hall of Camdozaal during and after the Defender of Varrock quest.
Origins
The Imcando Dwarves were amongst the races created by Guthix during the First Age. The Imcando existed during the God Wars, the devastation of which lead to their refusal of Zemouregal's, a Mahjarrat, that sought one of their most powerful artefacts, the Shield of Arrav. The Shield of Arrav was an object of uncomprehendable power, which had arrived in Gielinor from another world.
The Imcando also had limited contact with the dwarves of Keldagrim, with whom they traded, to some degree.
Arrav of Avarrocka
Arrav, after meeting Zemouregal in the Land of Dreams, was sent by his village's elders to find the mythical Shield of Arrav, in the possession of the Imcando dwarves. After wandering through what would later become Asgarnia, Arrav settled at the foot of a mountain, possibly Ice Mountain where he was greeted by several Imcando. Despite their refusals of knowing the Shield, Arrav stayed with them, hoping to gain their trust. After spending many days with the Imcando and learning their arts of mining and smithing he was refused the Shield.
Some time later, Arrav was given the shield, which he used to defend Avarrocka (now Varrock) from an army of undead, led by Zemouregal. Amongst those protecting the city were the Imcando, who fought as soldiers and dug trenches. Arrav was killed in the battle, but the Imcando remained friends of Varrock.
Destruction
Roughly a century ago, during the Barbarian invasions of the years 42-62 in the Fifth Age, the thriving Imcando dwarves were nearly rendered extinct.
The White Knights of Falador had given the Imcando Dwarves many fire and nature runes, allowing them to cast the Superheat Item spell. The Fremennik invaders, who sought to end the use of the newly discovered runestones, attacked the Imcando in their home on Ice Mountain.
Few Imcando escaped the assault. Only Thurgo willingly shows himself today, although he has hinted there are other survivors hidden somewhere.
Smithing
Up to their destruction the Imcando tribe of Dwarves were particularly skilled in Smithing weaponry, and possibly Mining. As mentioned above the sword of Sir Vyvin, passed down through five generations, was created by the Imcando. For many hundreds of years they were the worlds most renowned, and best, smiths. (Therefore, it is no surprise that Thurgo, one of the last known remaining Imcando Dwarves, has the Smithing cape.) The techniques used by the Imcando were secret, passed down from generation to generation, and any devices created by the Imcando are very hard to replicate. The Imcando are among the few races to utilise Blurite, found in the Blurite caves.