Number of casts: 20+. Difficulty: Hard. This is one of my largest projects ever. Initially it began as a dwarven fortress to go up against a mountain. Unfortunately I didn't like how the mountain came out and decided it might be more useful if I left it unattached to a base, so it could be used in seige games with wall segments attached. The portions of the gatehouse on the top were particularly difficult because they had to be reinforced with thin card to keep from collapsing.