mkay gonna try crashing in
Found that mossy rock, now will mine the cobble.
You got lucky with that.
When I found my first dungeon, it was split open into the cave I was mining in, and the mob spawner JUST SO HAPPENED to be set to spiders. Not to mention, at the time I had no health items and before long, those nasty forgets tore me almost to pieces and I had to lock myself in a small area and dig strait up to the surface. I had no idea where I was either. When I hit the top, I had to "start over", building a small hut to store some things in, digging away at trees with my bare hands because I didn't bring in axe, looking for pigs to kill, until I was finally ready to go back in. So I dug back down there, kicked some ass, and killed the mob spawner.
It is now my bitch. It works in the basement of my castle, giving me an infinite supply of pigs to eat.