At the beginning of your upkeep, look at the top card of your library. You may put that card into your graveyard. Exile a card from your graveyard: Add {C}. Spend this mana only to cast a spell that's one or more colors without {X} in its mana cost.
Drakes prowl the skies of Kaladesh, waiting for the perfect moment to strike.
Near Mint - $0.25
Lightly Played - $0.24
Moderately Played - $0.19
Heavily Played - $0.15
Damaged - $0.10
Near Mint Non-English - $0.25
Lightly Played Non-English - $0.24
Moderately Played Non-English - $0.19
Heavily Played Non-English - $0.15
Damaged Non-English - $0.10