Jet Collector is a rare Creature — Merfolk Scout card from Alchemy: Outlaws of Thunder Junction (YOTJ), collector number 18.
At the beginning of your second main phase, if there are four or more cards in your graveyard, conjure a card named Mox Jet into your hand. This ability triggers only once. {X}{B}: Return target creature card with mana value X from your graveyard to the battlefield with a finality counter on it. Activate only as a sorcery.