I don't have the card in front of me, so I'm going off of memory for those of you who want to know what "set fire" does. It is a crimson enahcement that you PLACE in an opponent's territory, and once per opponent turn (I think in upkeep phase), that opponent must discard one single color site or one fortress from their territory. When none of those remain, discard "Set Fire". (Hope I'm remembering this right).
What happens to the cards INSIDE that fortress, like inside a Storehouse holding a bunch of enhancements, or a High Priest's Palace holding Unholy Writ and 30 Pieces of Silver, or a fortress holding various good or evil chracters? We assumed that the fortress and all cards within it at that time are discarded, but I thought I would make sure.
Thanks.