if they're all in one place, a controlled cave-in would do wonders
Good point. I was thinking of that. Either I go waaaay down and plug them in and hope they don't reach the new hole in time to stop me, or...
This is the shaft, for 19 z-levels down:
XX
XX
Everything above it is the same though. Will a cork made of stairs do the same thing?
Question is, will it kill them all with absolute certainty or will some survive resulting in an involuntary all-fortress party of a most unproductive sort? I'm expecting murphy's law to come into effect if I try a cave-in.
Spike traps are supposed to be very reliable, but I'm not looking forward to all the labour involved.
Plugging them in should be the easiest method. I always hit caverns and have to make hallways to go around, so it should take them longer to get to the intended position of my wall than it should take to build the wall from the time I crack open the hallway and they start pathing that way.
Then I can construct a way for an adventurer (equipped in candy of course) to open up the surprise.
Okay I've opened it up... Now for some slow-mo construction. 0 FPS...
Edit: The hole is now plugged. Took something like half an hour to do something that usually would have taken something like 10 seconds. And now they're wandering the hallways, safely tucked away (for now).
Nevermind... There's more of them coming up the hole now.
And I thought I'd have a chance to plug it up before more of them generated.
Aaaand.... Somehow one of my swordmasters managed to kill them before dying himself.
Trying to plug up the original hole to the circus.... with a raw adamantine wall 'cause that's the closest material.
Edit again: plugged. Safe. Until the next screw-up.