Oh, what fun it caused! No, magma did not flood my fortress, but it did set off a chain of events that ended in its abandonment. This was in 40d, by the way.
It was a pretty average fortress for me, meaning it did fine until the goblins started ambushing. Then, my newly-legendary glassmaker decided to go outside, got four red injuries, but got miraculously rescued. He was then recovering for an indefinite period of time. Then I got a legendary Leatherworker from anther mood- who promptly discovered a goblin thief and got an injured spine, leaving him in the same state as my glassmaker. My next mood was a possession. Those three details are important. Anyway, after the first ambush I made a death corridor of traps that held them off pretty well and had a three-dwarf squad of 2 axedwarves and one hammerdwarf that could be stationed around a corner to get anyone that got through. That also worked pretty well for a while. Then my magma finally reached the pit underneath my smelters and forges, and I started having some REAL fun. First, my four of my dwarves decided to run down the stair that I just realized I never deconstructed into the magma pit to "Clean" up the molten rock. Three ran into the magma and burned to death. The fourth, my bookeeper (remember, legendary ones are ultra-mighty and superdwarvenly tough) got out. His wife was one of the ones that burned to death, and not even my legendary dining hall could placate him. He threw a tantrum, and managed to beat a peasant to death in a fistfight in about three seconds. That peasant, who had refused to do any labor I assigned him, had become very popular among my population. This set off a MASSIVE tantrum spiral. Within one dwarf month, half of my population of 70 was dead. Of course it was the essential half. My growers, miners, craftsdwarves, masons, metalworkers, etc. were the casualties. All that was left were woodworkers, dyers/herbalists/millers/etc., mechanics (useless because I'd made a huge stockpile of mechanisms already) peasants, a siege engineer, children/babies, my military, and a few other things I'm forgetting. Then, because apparently the goblins were content to watch my dwarves kill each other instead of invading, the first wave of migrants since the goblin ambushes started a year and a half ago showed up (with a dungeon keeper). This promptly brought my population back up around 85 (it was a huge migrant wave). There were some useful people in that wave- another glassmaker to replace the one that had been in a coma for almost two years, more stonecrafters/masons/etc. In fact, the new glassmaker immediately went fey. I started feeling optimistic- my fortress was reviving!
Yeah, fat chance. The migrants got ambushed by fire imps and lava men. Half of them immediately were blasted with flames and/or died in the massive forest fire that started. The glassmaker made it to the fortress with a broken toe, and immediately started making his artifact. He churned out a WTFvaluable glass sarcophagus. It was worth somewhere in the 70,000's. Yay! A new legendary glassmaker! Only, he decided to go rest to recover his toe. Wow, thanks. This game seems hell-bent on denying me any dwarves with legendary skills. Anyway, another tantrum spiral started, and it started effecting my military. I stationed the most stable one to defend the workshops, and that worked for a while. I locked a bunch of the berserkers and tantrumers in the dining hall while everyone else was ordered to go dump stuff. They ended up killing each other very efficiently, and then my war dog pack tore apart the survivors that broke the doors. Then my original legendary glassmaker woke up, just in time for the magma glass furnace to power up. I sent him over to start making glass stuff to get some valuable furniture for my replacement mayor and dungeon master, when the workshop guard when berserk and slaughtered him. I didn't see how it could get any worse, when...
"A vile force of darkness has arrived!"
esc -> Succumb to the Invasion
When I named it "Anguishedhalls" I had no idea how appropriate the name would be. It was almost as appropriate than my fortress "Metalbane" in .31. That time, a "goblin ambush" (it was one goblin and five humans) broke into my fortress and killed a bunch of dorfs. This started a tantrum spiral, so I started digging down so I could breach a cavern to send everyone that wasn't insane so they'd be safe. While that was happening, one of my axedwarves hulked out and killed all of the berserkers and especially destructive tantrumers so quickly that it wasn't a problem any more. Just before he became an axe lord, I beached the cavern. Yay! Then, a forgotten beast that was a flying glob of molten metal flew out and killed everyone. I'm not sure how it stayed together...
I hate tantrum spirals. Why can't I just run out of food or lose to a massive siege for once?