The way it worked was that I drew my whole deck and had Ghost in my hand. I bought Tunnel, putting it in my discard, then played Ghost, flipping the Tunnel and gaining a Gold. The Ghost didn't hit an Action, but I didn't mind because Ghost is discarded on the turn it's played if it doesn't hit anything.
OK, so what I envisaged.
I can't help feeling that simply buying a Gold is simpler than messing about with Haunted Mirror or Exorcist to gain a Ghost, drawing your deck then buying a Tunnel. (-8
I can't remember what else was going on, but it seemed like a good move at the time.
KC + Inventor
wew this rules, it's effectively:
gain a card costing up to $4
gain a card costing up to ($5)
gain a card costing up to ($6)
buy stuff @ -$3
Edit: KCx2 + Inventor x3 = 6 guaranteed Provinces lol
Impressive, but KCx2 + Bridgex3 still has this one beat. Really, it's harder to come up with things KC
doesn't have a neat and potentially useful interaction with. The list of Action cards KC doesn't improve (without tokens) is a pretty short one: Library, Watchtower, Counting House, Outpost, Duplicate, Distant Lands, Tactician, Secret Chamber if we include cut cards, Madman and Wish if we include non-supply ones.