A primary stat of 60 is suggested. If your main stat isn't high enough, you'll see the following message:
The grim dirges of the 7-Foot Dwarfs surge from within the mine, as the ring of steel on stone reminds you that each of these giant dwarfs is carrying a sizable pickaxe. Axe yourself, are you prepared to face them?
(It is recommended that you have at least 60 <mainstat> to adventure here.)
Note: This adventure is triggered whenever you adventure here while feeling Lucky!.
In Disguise
Go Inside Itznotyerzitz Mine
"Dressed in your Mining Gear, you stride past the 7-Foot Dwarves who guard Itznotyerzitz Mine. You walk deep into one of the shafts, and find a nice, quiet place to mine."
"Brandishing your fists of earthen fisting, you stride past the 7-Foot Dwarves who guard Itznotyerzitz Mine. You walk deep into one of the shafts, and find a nice, quiet place to mine."
If you have been given the Dwarven Factory Quest, the following additional text will appear (on your first time only):
"Off to one side of the work face, you spot a tunnel entrance that looks like it might lead to the Dwarves' factory complex."
Non-combats in this area have a cap of 9 turns between occurrences.
References
Itznotyerzitz Mine, when pronounced, sounds like, "It's not yours, it's mine."
The 7-Foot Dwarves are no doubt a reference to the seven dwarfs of Snow White fame. They are not a reference to the movie Happily N'Ever After, which came out after their insertion into the game.
It is quite ironic to have a 7-foot tall "dwarf," as the word typically implies someone shorter that is than average.