Frenzied Flame Seal

{t}, exile a land you control: exile the top 3 cards from your library. You may cast them until end of turn.
{x}, {t} sacrifice Frenzied Flame Seal: you
deal X damage to all players.
'Formless sacred seal bestowed by the maiden of
the Three Fingers. This is the mark of the Lord
of Frenzied Flame.'