This was answered by Donald. You gain a $6 card.



OK. Hm, this seems strange to me together with the other ruling (although Donald X. mentioned that that ruling was sort of tentative: http://forum.dominionstrategy.com/index.php?topic=4083.msg87589#msg87589 ).Following the thinking there I'd have thought that in this case Procession only would see the BoM as whatever card you wanted it to be, and thus never know about what price the original BoM had.