The Dwarven Pick of Erebor
The dwarves, miners of legend, have made this pick, which is so expertly
crafted that even weaklings can bore through solid rock with it.
A pick that provides a magical light by which to see while tunnelling.
It can be activated for open a secret passage every 75 turns if it is
being worn. It provides light (radius 1) forever. It increases your
strength and ability to tunnel by 5. It sustains your strength. It
provides resistance to light, dark and chaos. It allows you to climb
mountains. It cannot be harmed by acid, cold, lightning or fire.
Level 50, Rarity 15, 20.0 lbs, 55000 Gold

(T.o.M.E. 2.3.5)