Apologies for no savegame (I did this in challenge mode, and if memory serves, you can't save there) and for not being very active on this forum lately. (blame my new job...)
Describe the Bug:
I cast
Cathedral Membrane while AI had
Lodestone Golem in play, and I did not have to pay the extra (1) mana that the golem requires. I cast it for 1W, rather than 1+2 life, if this is relevant. I suspect that it is the same issue as hybrid cards like
Manamorphose or
Kitchen Finks have where cost modifications don't work right on them.
Which card did behave improperly:
Cathedral Membrane and
Lodestone GolemWhat exactly should be the correct behavior/interaction ?
With Lodestone golem out,
Cathedral Membrane should cost either 2W or 1W+2 life to cast. I was able to cast it for 1W.
Are any other cards possibly affected by this bug ?
Probably every card where mana can be alternately paid by 2 life. I'm not familiar enough with the new cards to list them all.