Instant
Look at the top four cards of your library. Put one of those cards into your hand and the rest into your graveyard.
Flashback {2}{B}{G} (You may cast this card from your graveyard for its flashback cost. Then exile it.)
The scree slope under Aduriz shifted, and grumbling, he scooped some pebbles away. The pile shone with a golden glint. And another. And another…