Brain in a Jar [Shadows over Innistrad Prerelease Promos]

{1}, {T}: Put a charge counter on Brain in a Jar, then you may cast an instant or sorcery spell with converted mana cost equal to the number of charge counters on Brain in a Jar from your hand without paying its mana cost.
{3}, {T}, Remove X charge counters from Brain in a Jar: Scry X.