if you can't, Greenbelt Rampager is returned to your hand and you get one energy counter
Clockwork Dragon ( F, C ) - A 6/6 for 6 is nice, and is a mana sink that takes colorless mana (for infinite colorless mana), and is an artifact if the deck has specific tutors for those
In the end, whether you're looking to sell some cards or just enjoying Magic: The Gathering as a collector, you will ultimately find yourself with a stack of cards sitting in front of you wondering what they are worth
And, of course, once you do pull an opponent's creature from the graveyard with it, you've got a few ways to destroy said creature and win the game
As usual, the biggest of these spikes are typically found on decades-old cards that havent seen play in ages