Brain in a Jar is a uncommon Artifact card from Shadows over Innistrad Remastered (SIR), collector number 247.
{1}, {T}: Put a charge counter on this artifact, then you may cast an instant or sorcery spell with mana value equal to the number of charge counters on this artifact from your hand without paying its mana cost. {3}, {T}, Remove X charge counters from this artifact: Scry X.