This is a combo that a friend of mine played on us, and after he played this combo on me and my other friends, we decided to always veto having both of them in the game at once because it's such a powerful combo.
As (most) of you know Poor house is a card in Dark Ages that costs $1. It's function is:+$4
"Reveal your hand. -$1 per Treasure card in your hand, to a minimum of $0." Not too special. When played with Chapel ("Trash up to four cards in your hand"), this card can work wonders. There are a few things that make this combo tick, and when it ticks it's incredibly powerful as I've already stated before:
1) Chapel and Poor House cost $2 and $1 respectively, making this a super easy combo to get started (note: you only need ONE Chapel)
2) Trashing ALL of your starting copper and estates, making Poor House give you +$4
3) Maybe get a Village/cantrip or a source of +Buy (not absolutely necessary)
4) Lots of Poor House
And what you have is a combo that's immune to Knights and is capable of gaining Provinces ridiculously fast (like turns 3-5, I can't quite remember). The main downside of this combo is that in colony games it's not going to be as good, but I could see it benefiting a rush strategy immensely in these sorts of scenarios.
Thoughts?