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I read somewhere on this forum that in order to use Oracle of Mul Daya, you're supposed to click a "flashback button". I can mouse over the card and see that a Forest is on the top of my library, but I can't play that forest by clicking on Oracle of Mul Daya. I've looked at every tab of every subsection of the Forge layout and can't find any "flashback button" that I'm supposed to click. I really want to play that Forest. How can I? A screenshot showing this mystical "flashback button" would be quite handy.

Here's the situation:

http://dl.dropbox.com/u/35695760/00000348.png

have you tried to click on the lightning symbol at the left side, the one under the graveyard icon?
Because sometimes it won't change, yet if you clock on it, you are able to cast the spell/land from the top of your libary

Hey, that was the button! Thank you so much! I'm surprised I missed that one. :D

Now I can happily continue my game. Wa ha ha!

Nordos wrote:have you tried to click on the lightning symbol at the left side, the one under the graveyard icon?
Because sometimes it won't change, yet if you clock on it, you are able to cast the spell/land from the top of your libary

So the flashback button does not always show that you can click on it to play a card that is playable? I see that in Alex's screenshot. Looks like you've found a bug here and perhaps it should be reported in the thread for the version of Forge that you are using so they can fix it.