The ability printed on Jedah it says that the attack is considered a foundation while in your staging area. Does this mean any appropriate E's or R's are playable because the attack is now considered a foundation?

I wanted to say no at first to the player who asked me, but then I couldn't really give a logical reason as to why you could not play them (Since they are still printed on the cards) I told them the ruling would have to wait.

No. It is a foundation with a blank text box.

Stamp for Baranor. It's like Annihilation, the ability on the attack can't be played.