Elemental Fusion

Play 1 Fusion creature from your Extra Deck,
purging creatures from your hand, field, and/or
discard pile as Fusion Material.
If this card is in your discard pile: You can target
1 of your purged "Elemental" creatures; shuffle
this card into the deck, and if you do, add that
card to your hand.
You can only use this effect of "Elemental
Fusion" once per turn.