Jarsyl, Dark Age Scion

At the beginning of combat on your turn, you
may cast a spell with mana value equal to 1 plus
the number of study counters on Jarsyl, Dark
Age Scion from your graveyard without paying
its mana cost. If you do, put a study counter on
Jarsyl.
Study counters remain on Jarsyl as it moves to
any zone other than a player's hand or library.