I knew about the orcs. I was expecting the orcs. The orcs were tough, and I lost several inadequately prepared forts to them at first.
In my frustration, I decided to build The Grinder™, a long entrance tunnel paved with weapon traps. Then I learned that orcs are trap avoiders by default.
I edited that attribute tag out right quick. Fun is fun, but I wanted to see the walls of my tunnel caked in orcspatter.
The Grinder worked great. The walls of my tunnel were caked in orcspatter.
Then the ancient vampire came.
Ancient vampires can fly over walls. They can breathe fire. They can probably do other things too, but I was too busy coming to grips with the fact that they can fricking fly and breathe fire to take detailed notes.
The ancient vampire "fought" his way down to my hospital level. I put the word in quotes because it wasn't so much fighting as it was walking … with fire.
There he sat. Occasionally he would wander over to a bed and incinerate the badly burned dwarf who was trying to recover there, but mostly he just hung out. My dwarves (the ones who were still alive and ambulatory) hung out in the dining room one floor below. A sort of detente was achieved.
I thought about walling off the hospital and moving on with my life, but instead I recruited the whole fort and sent them in as unskilled wrestlers.
My fort crumbled to its end.
Dig Deeper can be Fun.