This is like a draw power for entropy. I like it however, the fact that you choose the card to return, and the card you receive is part of your own deck has very little element of randomness (the fact that its entropy)
So, sending a fractalled spark, with a lot of these chaos gates, does produce many opportunities.
If the drawn card was random, it would suit the theme a little better.
Otherwise, great idea of recycling!
Oh yeah, if this card was used (same effect, not random as i suggested), I'd use TIME! Coz it's like shuffling a deck of cards, where each card is a certain time.