Sedlec Ossuary

When Sedlec Ossuary comes into play, you may
reveal a Horror, Shade, Skeleton, Zombie,
Wraith, or Creature card with Plague in your
hand. If you do not, it comes into play tapped.
Pay 1 life, {t}: Add 1 mana of any color to your
mana pool. If this mana is used to cast a creature spell, that spell has Hexproof.
{t}: Add {1} to your mana pool.