Couple of questions regarding Young Witch's Bane:
(1) Young Witch says the Bane card must cost $2 or $3. Can Stonemason, Doctor, and Masterpiece be the Bane? Technically, they don't cost $2 or $3.
(2) When determining if you should put out Colonies/Platinums, you choose one of the Kingdom cards at random: if it's a Prosperity card, put out Colonies/Platinums; else, don't. Do you include the Bane/11th card for this? Same could be asked about Shelters / Dark Ages.
EDIT: Another somewhat-related question regarding Colonies/Platinums and Shelters.
From the Prosperity Rulebook:
"If a mix of Kingdom cards from Prosperity and other sets are being used, then the inclusion of Platinum and Colony in the Supply should be determined randomly, based on the proportion of Prosperity and non-Prosperity cards in use."
Does that mean green cards should have 8/10 the weight (in a 2-player game) as normal kingdom piles when choosing the "random" pile? Similarly, should Rats have twice the weight?