Jarsyl, Dark Age Scion is a mythic Legendary Creature — Human Wizard card from Alchemy: The Brothers' War (YBRO), collector number 20.
Starting intensity 1 At the beginning of combat on your turn, you may cast a spell with mana value equal to Jarsyl, Dark Age Scion's intensity from your graveyard without paying its mana cost. If you do, Jarsyl intensifies by 1.