Originally posted by mediding:

If I wanted a bunch of greydwarf eyes or just liked how it felt to cut through a horde, is there some item I can use to get a siege?

I left a greydwarf spawner active not too far from my base to get access to materials easily.

Originally posted by Tatsuyo:

i'm getting a siege avery 10 minutes and mobs are spawning inside my base since las update.

That's very unusual.