Glacite Mineshafts: NPCs, Mobs & Travel

Glacite Mineshafts are private instances that open while you mine in the Glacite Tunnels of the Dwarven Mines.¹ The tunnels are behind the Dwarven Base Camp, which needs Heart of the Mountain tier 7.²

Finding one. Every block you break in the tunnels has a base chance of 0.05% (1 in 2,000) to open a mineshaft portal, raised by the Surveyor perk of the Heart of the Mountain.¹ A pity counter guarantees one: it drops with each block by that block's quality (half for blocks broken by Mining Spread or Pickobolus), and the portal opens when it reaches zero.¹ Once a portal appears you have 30 seconds to go in.¹

Inside

Each mineshaft is themed on one resource, such as Umber, Tungsten or a gemstone; mining the matching block last makes that type more likely.¹
Frozen Corpses (such as the Lapis Corpse) hold loot; one to three spawn depending on the shaft's size.¹
Some gemstone shafts hold a Gemstone Crystal, which only the shaft's owner can take.¹
Most movement abilities are disabled; the Grappling Hook still works.¹
Dying sends you back to the Base Camp and you can't return.¹

Leaving through the entrance or with an Ascension Rope pays extra Glacite Powder: a base amount, plus more for each Suspicious Scrap found, corpse looted and point of Cold endured.¹