Maralen, Fae Ascendant (ECL-233) - Lorwyn Eclipsed

Flying

Whenever Maralen or another Elf or Faerie you control enters, exile the top two cards of target opponent's library.

Once each turn, you may cast a spell with mana value less than or equal to the number of Elves and Faeries you control from among cards exiled with Maralen this turn without paying its mana cost.