MArcomage

I don't think there should be a penalty for each card discarded. Its uses are already pretty niche (especially since your chances of drawing a given card decrease the more you have in your hand). Good against flare attack, but how often are you going to be facing a burning deck?

And yeah, the illusion keyword is nice, but there are already a number of good common illusion cards.

This is very similar to my proposed card Accumulation, marked Interesting a long time ago. Mine gave wall and tower per discarded card.

I think it could be used also in a Titan deck for instance.
I several times have 2 or more copies of the same card ...i even got 2 sames rares.
I see that the replace of the cards when used would be as an advantage soo the cost.
Also the card is common.
If the -2G additional cost is not need it can of course be taken out (maybe if Quick or Swift card the cost would be more interesting?).

I change the wording to replace for a card with the same-rarity (I think that is more interesting and needs some cost)

Similar to my concept Cultural variety too, though that was uncommon