E: Add this card to your card pool: For the rest of this turn, foundations do not add to progressive difficulty of non-foundation cards.

My question: At end of turn that this enhance was used is this card dicarded or returned to the staging area?

Doozee said:

Discarded because it was added to your card pool not played into your card pool.

See the Pillar of Heaven discussion for the exact same reasoning.

ok - another clarification - if a character card such as Ivy * R: Commit 1 foundation: after your attack deals 3 damage or less, draw a card. If the damage is zero can you still draw a card?

for an attack to deal damage it has to cause a vitality loss, and ivy's ability requires it to do damage less than or equal to 3. so no, 1-3 dmg required for ivy's reaction

^The same reasoning worded differently: If your move does 0 damage, it doesn't actually deal damage. So if your attack has 0 or less damage, you'll never be able to play her R

I have a lot of magic players who have a hard time accepting that zero damage is no damage at all. Thanx for putting it in writing.